Original subtitles

NARRATOR: Ancient structures built

with enormous stone blocks.

Solid granite cut with laser-like precision.

And accounts of astounding technological capabilities.

For nearly two decades,

Ancient Aliens has traveled the globe

exploring towering megalithic structures,

mysterious artifacts,

and stories of otherworldly beings

in a quest for evidence

that might reveal the truth of our extraterrestrial origins.

A lot of these sites that we've featured,

most people haven't even heard about beforehand.

NARRATOR: Now, we take a look back through the Ancient Aliens archives

to the show's very origins,

to examine the evidence that we are not alone.

We have never been alone.

♪ ♪

How cool is it to be able to look back

ten, 11, 15 years ago

of Ancient Aliens?

We know have

about 300 hours

worth of content.

Yeah, it just goes to show you just how much evidence

there is for ancient astronaut theory.

And what strikes me as I look back over the years

is the number of fields that the evidence crosses through,

from art, religion, archaeology, astronomy,

-mythology... -JASON MARTELL: And engineering.

I-I love that "wow" factor

when we look at a lot of the sites like Sacsayhuamán,

Göbekli Tepe, Baalbek,

we have to wonder how they could stack

hundred-ton stones perfectly.

Yeah, and that is one of the reasons

why ancient engineering was one of the first topics

that we covered on Ancient Aliens.

And starting with the Pyramids of Giza.

Yeah. No, look, by now, it's clear that we've all aged

-like fine wine. -(chuckles)

But the great Pyramids of Giza have retained

their magnificence for thousands of years.

And it's all just as mystifying and exciting

as it was at the time.

NARRATOR: In today's largest construction sites

and quarries,

huge megamachines are used to dig,

cut and lift stone.

These man-made creatures dwarf their creators

and perform the work of thousands of men

using modern hydraulic technologies.

Without such equipment,

builders could never construct modern skyscrapers.

Yet, thousands of years ago,

ancient civilizations were accomplishing the same work

while constructing their monuments and temples

using massive stones.

These enormous blocks--

many weighing in excess of 100 tons--

would be a challenge even for today's engineers.

Yet, thousands of years ago,

people cut them out of solid rock,

transported them for miles

and then lifted them precisely into place.

But how?

Did they cut these massive stone blocks with hammers, chisels,

and copper wire, as mainstream archeologists suggest?

Could they have lifted and transported them

without a pulley system, or the wheel?

Or did ancient civilizations possess advanced technologies

that have since been lost to science?

ROBERT BAUVAL: At Giza, you just don't have the pyramids.

Linked to the pyramids are

what Egyptologists call valley temples.

It doesn't take a rocket engineer

that when you go there,

there's something not quite right here.

Whereas the pyramids are built with blocks

of two to three tons,

these temples,

which are minute compared to the pyramids,

are built with blocks of 100 tons

and some of them 200 tons.

Let me tell you what a 100-ton block is.

If you take a 100 family cars

and you squeeze them together, you get one of these blocks.

First of all-- let alone how they move these blocks--

is why would they want to use 100-ton blocks?

It simply doesn't make sense.

♪ ♪

There's no reason for them

to want to build out of granite blocks

the size of a semitruck.

It's like "Okay, let's do something,

but let's do it as difficult as we could possibly do it."

The reason why I am convinced

that sophisticated technology was utilized

in these ancient rocks is because

if we go to a stone quarry today

and look at the scope of machinery required

to accomplish similar things,

those machines are huge.

NARRATOR: Subscribers to ancient alien theory

do not believe extraterrestrials built these amazing monuments

but instead provided some type of technological know-how

or tools to our ancestors.

Engineering expert Chris Dunn has spent several decades

researching the construction tools used

by the ancient Egyptians.

We're normally taught by Egyptologists

that the ancient Egyptians had simple tools.

They went to work every day using stone balls,

copper chisels or copper tube

and sand to-to grind holes in,

in diorite and granite, extremely hard rock.

From what I have actually gathered over the years,

is information that seems to actually argue

against that notion that they had simple tools.

NARRATOR: In Egypt, Dunn was able

to examine ancient sites firsthand.

What he found has proved

to be both revolutionary and controversial.

DUNN: If you look at the Giza Plateau

and all the stones

that they actually placed in the Great Pyramid

and Khafre's pyramid, Menkaure's pyramid,

two and a half million blocks of stone

in the Great Pyramid alone.

They had to have some efficient means

of cutting them to size and putting them into place.

They had to have had somebody on site

who's saying, "Okay, I need a block this size."

And then getting a block to them that size.

Stat. Like, immediately.

NARRATOR: While searching several miles north of Giza at Abu Rawash,

Dunn stumbled upon a clue when he spotted a granite block

containing a deep cut.

DUNN: When I first saw it, I just didn't know what to make of it.

And it was only after

puzzling over it for days,

and sometimes waking up at 3:00 in the morning

scratching my head and thinking,

"Well, how did they make this cut?"

And finally to realize that the only way

that they could have actually cut that thing was

with a saw that was 35 feet in diameter.

The idea that ancient Egyptians used giant saws

provoked much resistance from mainstream archeologists.

Dunn, however, was convinced.

As an ex-machinist, I look for tool marks.

I look for them everywhere I go,

and I could be accused of, "Well, you know,

"if you're gonna look for something,

"you're probably gonna find it because you're looking at it

through a certain filter."

Accepted, I agree.

But the question is, why is it there?

Clearly, to me, that is a machine mark.

But there were no machines back then.

So, what-what do I do?

I just go looking for more machine marks

and-and they're all over the place.

♪ ♪

You find them on statues,

you'll find them, particularly, in the Luxor Museum.

There seems to be an impression

on the side of Amon's buttock

where it meets the bench...

...where there is an undercut.

It was a slip of a tool.

And, therefore, it must have been

a tool that was quite efficient.

NARRATOR: Dunn also believes

that the large depressions in the ground at Giza

are not boat pits--

as is claimed by mainstream archeologists--

but were actually used to hold the 35-foot saws.

I speculate that they were actually saw pits.

The saws were mounted in these pits

and that they ran the blocks through the saws

before they put them in the Great Pyramid.

Another mystery involves how mega stones were lifted up

and placed into a precise position.

What you find in modern construction is

that to build big buildings,

you need to build big instruments,

which help build these big buildings.

And that is something

which archaeology has never addressed.

NARRATOR: The three largest man-made stones in the world

are found at The Temple of Jupiter at Baalbek in Lebanon.

Each weighs an estimated 1,000 tons

or two million pounds.

A nearby quarry contains an even bigger stone

known as the Stone of the Pregnant Woman.

This giant rectangular block weighs an incredible 1,200 tons.

To move it today would take the strength

of 21 heavy lift cranes.

PETER PALUTIKOF: Being in the construction industry,

if a certain project is being constructed somewhere,

particularly in mountainous areas,

how would we carry this machinery?

These cranes and all that?

They are so heavy that it is virtually impossible

to take them to the site.

ROGER HOPKINS: This stone came off of a,

a project in Palm Springs, where they were...

had one of the largest excavators

they could rent.

They had trouble loading it into the truck.

It's well in excess of five tons,

ten thousand pounds.

Small in megalithic terms,

but basically

what we can handle with modern machinery.

We're supposed to accept

that the people who built the pyramids

did not have the wheel, did not have the pulley,

did not have iron, in fact, they had nothing.

With brutal manpower and pieces of strings,

the context does not fit the evidence.

NARRATOR: Ancient man's method

of moving large blocks is only one mystery.

Another surrounds the techniques of their stonemasons.

How did pre-historic civilizations

cut such intricately designed patterns in solid granite?

NARRATOR: Master stonemason and sculptor Roger Hopkins

uses a variety of advanced tools to cut and shape hard stones.

Powered implements such as diamond-tipped wires

and polishers enable him to fashion works of art

out of huge granite blocks obtained from nearby quarries.

Yet even with these high-tech tools,

Hopkins cannot replicate what ancient civilizations

accomplished thousands of years ago.

Could these advanced engineering methods

be the smoking gun that proves

humans had help from alien beings?

HOPKINS: The precision on some of the work that I have seen

is just incredible.

It's possible to do by hand,

but it'd take an incredible amount of time.

Plus, you have to have years of experience

to be able to pull it off.

TSOUKALOS: In my opinion, the most tangible pieces

of evidence that we have

regarding possible extraterrestrial technology

is when we look at the ancient

stonecutting techniques.

Because, in some instances,

we ourselves today could not replicate

what our ancestors allegedly accomplished

with stonemasonry.

NARRATOR: Puma Punku is a large temple complex

located on a high plateau in Bolivia.

(sheep bleating)

Mainstream archaeologists date the site

from approximately 200 BC.

The people who lived here had neither a written language

nor the wheel, yet somehow

they built one of the world's most complex structures.

Ancient alien theorists view Puma Punku

as clear proof of extraterrestrial influence.

TSOUKALOS: The ruins we find at Puma Punku are simply

extraordinary.

Puma Punku defies logic.

COPPENS: The interest of Puma Punku is not so much

that the individual stones sorted together perfectly,

but the fact that the stones,

as such, are of such tremendous design

that it requires concepts of mathematics

which are far beyond anything we are actually using right now.

Yet somehow, in the past,

somebody has made that for a specific purpose.

And in a way which even computer programs today

would kind of go, "How is this possible?"

TSOUKALOS: In the highlands of Bolivia, Puma Punku,

some of these blocks are over 40 to 50 tons each.

What can you tell us about this?

HOPKINS: Boy, they, they had

their, uh, stonecutting abilities,

you know, pretty well fine-tuned for 5,000 years old.

I mean, uh... it's almost unbelievable.

But the-- these cutting planes

that they have on here are very impressive.

And some of the incised cuts.

See, like in-in here,

all these interior cuts?

-Very hard to do. -TSOUKALOS: Mm-hmm.

HOPKINS: I mean, it would be difficult

for us with the-- our equipment

to get that kind of precision.

TSOUKALOS: Let's talk a little bit about

-inside boxes. -Ooh.

I was afraid you were gonna pull something like this on me.

That is a hell of a piece of work.

I mean, if we were to do something like that today,

we'd use what they have--

these, uh, computer-driven

CNC machines which are-- have diamond tips and,

uh, you have a template that, you know, the computer follows.

And even then, it may not come out as perfect.

Because even though you can tell that, obviously,

this piece broke off...

-HOPKINS: Mm-hmm. -...nowhere in here

can you see any imperfection.

It's like-- and by the way, when you're there,

if you go with your finger over these edges,

and you put a little pressure on your fingertip,

you can cut yourself.

This is how sharp the edges are.

NARRATOR: But where could the ancient peoples

have developed such technology?

Is it really possible that extraterrestrial visitors

provided different construction methods and tools?

When I saw these blocks,

I didn't really think that they were cut.

The first thing really that I thought of was

this appears very similar to Frank Lloyd Wright's

textile block system of construction,

which he used in his California houses

in the early 1920s.

Now, what he did was

he took concrete, poured it into molds.

There actually are ancient Incan legends

that suggest that they had the capability

of softening the stone.

At Sacsayhuamán, for example,

we find these gigantic stone blocks,

gigantic stone walls,

where it looks as if those stones were molten,

put into place,

and then the stone hardened again.

NARRATOR: Several hundred miles north of Puma Punku,

Machu Picchu sits high atop the Peruvian Andes.

Built by the Incas in the 15th century,

this stone citadel

was suddenly abandoned about 100 years later.

Like Puma Punku, Machu Picchu also has signs

of advanced engineering

and possibly molded stones.

DUNN: I can't help but think that whoever was behind this,

thought the process through from beginning to end.

They didn't quarry the rock and then decide,

"How the heck are we gonna transport this?"

They knew, from beginning to end, what needed to be done

with whatever techniques and technology

they were going to use.

So that this was no big deal.

In industry today, there's a... kind of an adage:

"Keep it simple, stupid."

NARRATOR: Based on his experience,

Mike Dunn believes the simplest way

to build the great walls of Machu Picchu would have been

to transport small rocks to the site,

then melt them and use molds to fashion

the exact size and shape needed.

MICHAEL DUNN: That would solve a lot

of difficulties of constructing this wall first.

You have your shapes, all the same size.

Each shape.

So you're guaranteed that they would fit together,

as opposed to being cut by different artisans.

HOPKINS: Melting the rocks, and then pouring them

into place would take an incredible amount of heat

just to spall off pieces of stone.

I have a-a stone torch,

which I use for sometimes shaping granite.

And, I mean, it generates a temperature of--

in excess of 3,000 degrees.

3,000 degrees.

That's a lot.

MICHAEL DUNN: When we look back at the ancients,

and we see a technology that they couldn't possibly know...

...there's only two possibilities:

that either God did it,

which we really don't think happened,

or some high-tech civilization

from another planet came and showed them how to do it.

Then took their materials and tools and went back home.

The idea behind that is that

none of these ancient monuments were constructed

or manufactured by extraterrestrials.

It was us, humans, who built it

with extraterrestrial technology.

HOPKINS: It's entirely possible that there were visitations.

That they pointed out ways to do things,

and that they wanted to leave some kind of a record.

And, I mean, if you're gonna leave a permanent record,

the only way you can do that is in stone.

There must have been thousands of ancient structures

made of mud and wood

that we'll never know existed.

But when you build with stone, that's for the ages.

-Mm-hmm. -And stone is much harder

to work with and build structures,

especially megalithic stones.

HENRY: Right, and these massive

stones were transported, in many cases,

from miles and miles away.

Yeah, and that is one of the smoking guns

of the ancient astronaut theory: transportation,

and also the stonework.

I mean some of, the stonework is so perfect

you can't even put a dollar bill

in between the fittings.

NARRATOR: Peru,

home of the world's longest mountain range,

the Andes,

the spine of South America.

Here, in a high river valley,

among peaks towering over 20,000 feet,

the Inca established

their capital city of Cuzco,

which thrived for over 300 years...

...until Spanish conquistadors

arrived in the 16th century.

Above Cuzco, at an elevation

of more than 12,000 feet,

looms the ancient fortress of Sacsayhuamán,

whose immense stone walls

may hold secrets which pre-date the Inca themselves.

GRAHAM HANCOCK: My feeling, very strong feeling,

is that we're looking at

a two-phase, uh, construction site

in many of the so-called, uh, Inca stone monuments.

And that the Inca structures

sit on top of much more ancient

rock-cut structures and megalithic structures

that we just don't know who built them.

And this actually fits with the Inca's own view.

NARRATOR: Like many Inca sites, Sacsayhuamán features

astonishing stonework,

but not all of it credited to the Inca.

According to conventional archaeology,

the Killke culture built the older sections of the site

approximately 1,000 years ago.

But the Inca themselves

believed the site was constructed

by an earlier, unnamed race of people

led by a powerful god

who descended from the skies.

MARTELL: Throughout time, there has been witness

to a god named Viracocha

that visited the South American people,

and blessed them and gave them all types of technology.

And some of his physical characteristics

make him stand out from the indigenous population

because he was a very tall,

pale-skinned, white-haired being.

But did this god Viracocha actually exist?

Could he have been, as ancient astronaut theorists suggest,

a visitor from an alien world?

If so, it might help to explain

just how the ancient site was constructed.

This rock weighs about 20 tons.

This is miniscule compared to many of the rocks

at Sacsayhuamán.

Today, we have heavy machinery to move such stones,

but in the ancient times, especially the Inca,

they would've used massive human work forces

working for massive amounts of time.

A rule of thumb is it takes about ten to 20 men

to move a one-ton rock.

So when you're talking hundreds of tons,

you're talking thousands of men.

CHILDRESS: What we see is a culture

who have got the technology

to quarry giant blocks of stone,

move them to, uh, the site where they want to build,

and then, to stack and cut

and articulate these massive blocks

into, in some cases, almost indestructible structure.

Talk about granite, you're talking about

a composition of feldspar, mica and quartz,

so you'd need diamond to actually abrade it or cut it.

We would use diamond today to cut granite.

Those are the kind of discoveries that lead one

to question whether they were really

using the tools in the ancient toolbox,

or whether there was something else at work.

NARRATOR: Shaman Jorge Delgado has spent most of his life

studying the mysterious structures of Peru,

many built prior to the rise of the Inca Empire.

JORGE DELGADO: It's amazing, all the weight of the stones.

You know? It's, uh, difficult,

definitely, for any human to move, even in groups.

And the other aspect is the-- how it's put together.

In some stones, we will see, still now,

there is, like, some marks that it seems that it was dissolved.

HANCOCK: The walls are put together with blocks of stone

weighing 50 or 100 tons,

cut and shaped like the pieces of a jigsaw puzzle,

so that they lock together so tightly

that you can't even get a sheet of paper between them.

There are signs in many of these stones

that show very large amounts of thermal heat

have been applied to mold the stones

in such a way that they fit perfectly.

And so, it really does raise a lot of questions.

TSOUKALOS: If you look at the style

the Sacsayhuamán wall was built,

the blocks look as if they've been molded like putty.

If you can mold stone into place,

then all of a sudden,

as crazy as this sounds,

it makes more sense because

there is no mortar that has been used.

NARRATOR: According to local legend,

a bird was responsible for the seamless construction.

Legends say the winged creature

carried a powerful chemical in its beak,

a substance capable of melting stone.

DELGADO: Sacsayhuamán means,

the head of the falcon.

"Falcon's head."

But, maybe was some falcons,

or maybe some bird people,

who could connect with the place.

NARRATOR: But is it possible,

as ancient astronaut theorists suggest,

that the mythical bird

might actually have been a spacecraft,

piloted by alien visitors

known to the locals as "space brothers"?

DELGADO: I believe that it's a combination

of the space brothers' technology

with other kind of possibilities.

Nowadays, we know different kind of tools.

We didn't had before, these kind of tools.

Or maybe we had more sophisticated.

So, the thing is that this place, Sacsayhuamán,

it continues as a mystery.

MARTELL: So, looking at all of these sites

with these perfectly stacked stones,

we're looking at a type of technology that's not used

anywhere else on Earth.

I don't discount human ingenuity,

but that type of engineering,

that we still can't duplicate today,

must raise a flag for further consideration.

It's almost extraterrestrial in a sense.

Someone had to have taught them these techniques.

NARRATOR: But whether the process of forming the large

megalithic stones involved the use of thermal energy,

or a mysterious chemical,

one thing is certain.

The ancient builders used the technique on a vast scale.

But why?

What was the intended purpose of creating

such intricately-built stone structures?

MARTELL: So, we can't really give an answer as to

what they were being used for other than

we know that the extraterrestrials,

more than likely, are the source

of what they call "gods."

How did they get here?

More than likely, in some type of craft.

And very possibly, they could've been

using these large megaliths as platforms to land on.

NARRATOR: But if Sacsayhuamán was, in fact,

constructed by alien visitors,

might there be additional evidence

of their time on Earth

at other ancient sites around the world?

Perhaps there is.

When we talk about megalithic sites in Peru,

we really have to include Puma Punku

just to the south in Bolivia.

Yeah, and as any fan of Ancient Aliens knows by now,

Puma Punku is, by far,

my most favorite place in order to illustrate

the ancient astronaut theory because

Puma Punku is unparalleled on Earth.

There is no other place like Puma Punku.

I remember, in 2013, we did an episode

where we sent David Childress there...

-Yes. -HENRY: Yeah. -...on location,

and he's, you know, examining the blocks,

and it's interesting to see how those blocks

fit together so perfectly in the past,

but today, the blocks are scattered

-all over that location. -That's right.

Yeah, but even in ruins,

it is clear that that place

was an incredible ancient piece

of magnificent engineering.

NARRATOR: Bolivia, South America.

Here, 45 miles west of La Paz,

isolated high in the Andes Mountains,

lie the mysterious ancient ruins of Puma Punku.

Spread across a desert plateau

at an altitude over 12,000 feet,

the megalithic stones found here

are among the largest on the planet...

...measuring up to 26 feet long

and weighing more than 100 tons each.

These are the mysterious ruins of Puma Punku,

nearly 13,000 feet

in the Altiplano of Bolivia.

What you have here

are massive blocks of granite

scattered like some kid's toy blocks

around the site.

It's like some giant cataclysm

just wiped out this entire area.

Archaeologists are baffled by what Puma Punku was,

how it looked and what the purpose

of this enormous structure would have been.

NARRATOR: Mainstream scientists believe

the site was originally constructed

about 2,000 years ago.

But in 1945,

archaeologist Arthur Posnansky proposed

that Puma Punku was much, much older.

By examining the structures and what he believed were

their original alignment with the stars,

he dated the ruins to 15,000 BC.

HUGH NEWMAN: Arthur Posnansky was a researcher.

He was part Bolivian,

and he worked at the site for many decades

and he concluded that the site must've been built

about 17,000 years ago

by studying the archeoastronomy of that particular site.

COPPENS: We don't know how old Puma Punku is.

We have had some circumstantial dating,

but we have been unable

to date the stones of Puma Punku themselves.

They could be thousands,

if not hundreds of thousands of years old.

We don't know.

GEORGE NOORY: I think the fascinating thing

about Puma Punku is how did these structures get built?

We're talking about stone that is 25 feet high.

Stone that is hundreds of tons.

FOERSTER: Puma Punku is so unique

in the way that it was constructed

and shaped and positioned

that it is the most intriguing ancient site on the planet.

Of all the places I've ever visited,

Puma Punku is the one that I go back to

time and again

because no one can solve the mystery.

NARRATOR: Mainstream scholars believe

the andesite blocks found at Puma Punku

were formed by hand with primitive stone tools.

But some researchers point to the intricate stonework

as evidence of the use of advanced precision technology.

One of the amazing things here at Puma Punku is

the precision of the blocks.

You can see with this block of granite

that it's really been cut

at very accurate right angles.

Not only do these granite blocks have

precision corners

but they also have these difficult drill holes

that are going right through the rock.

♪ ♪

NARRATOR: But how could such primitive people,

living perhaps tens of thousands of years ago,

have produced such flawless stonework?

Might the ancient builders of Puma Punku have fabricated

the megalithic stones with advanced technology,

technology of an otherworldly origin,

as ancient astronaut theorists believe?

If you look at the stones carefully

and you get a magnifying glass on some of them,

you can see some intricate stonework,

as though they're using machine tools

or even lasers.

It's absolutely incredible.

I've seen nothing like it anywhere on the planet.

When an architect or an engineer looks at Puma Punku,

one thing jumps out immediately...

that whoever built this place

had knowledge of planning, of logistics,

and had access to advanced technology.

You know, Brien, this is one of the most interesting

and unusual stones

here at Puma Punku.

It's got these perfect right angles.

And then, each of these small drill holes are

basically evenly spaced along this routed groove.

To me, it's clear that power tools have been used

on this unusual block of stone here.

Well, exactly. And this surface is as smooth as a tabletop,

like in your kitchen.

There's no wave to it or anything.

It's-- This was machined.

But who machined it?

It's an astonishing piece of work.

And how anyone could think

that primitive human beings could have done this,

you know, it's just crazy.

If anything looks like ancient aliens,

it's this stone.

NARRATOR: But if otherworldly technology was used at Puma Punku,

where is the proof?

In Danville, Illinois,

machinist and toolmaker Chris Dunn

has put the Puma Punku stone

through the ultimate cutting test,

using both laser technology

and a modern diamond saw.

We've got a sample of the laser cut.

This is the diamond wheel cut.

And the top surface is the original cut surface

from Puma Punku.

So now we can compare the difference

between all three cuts.

NARRATOR: Looking at the stone under a microscope,

Dunn compares the two modern cutting techniques

with the part of the stone cut thousands of years ago.

Though age has worn the surface of the ancient example,

the comparison reveals distinct differences.

You've got vitrification on the laser cut side.

And then, of course, you've got circular tool marks

on, uh, the-the side cut with the diamond saw.

And then whatever tool they used to cut the ancient surface

must have been a different method.

Now, do you think it's possible

that some type of a diamond precision tool

was used on the old surface,

but because it was such a long time ago

that, over time, the surface became a bit more rough?

And we're talking 10,000 or even 15,000 years ago.

DUNN: That is a reasonable speculation.

I think we have to start examining, um,

a little more sophisticated tools that no longer exist.

NARRATOR: What did the ancients use

to cut the andesite stone so precisely?

Might evidence of advanced technology be found

by further study of the construction

of the Puma Punku stones?

Ancient astronaut theorists say yes

and point to what they call H-blocks.

Seems like every one of these H-blocks is exactly the same.

So it's like a prefabrication process,

where they needed x-hundred of these.

And whatever machinery it is that they had was able,

with amazing accuracy, to replicate

one after another after another.

That's very sophisticated.

CHILDRESS: Yeah, it's an ingenious way

of building a huge granite wall.

And, again, the whole thing is just so incredibly precise--

doing these kind of inside corners like this.

This-this just can't be done, really,

with-with copper chisels and-and stone hammers.

The whole thing is...

is-is just so incredibly high-tech,

even beyond what we would do today.

NARRATOR: But how could the ancients have managed to move

the incredibly heavy andesite stones to the site?

After years of research,

mainstream archaeologists have said the massive stones

were hewn at quarries over 60 miles away

and then rolled to Puma Punku on logs.

What nobody talks about is the irrefutable fact

that we are at an altitude of 12,800 feet,

which means we are above the natural tree line.

No trees ever grew in that area,

meaning no trees were cut down

in order to use wooden rollers.

-The wooden roller theory... -(snaps fingers)

...falls by the wayside.

NARRATOR: Could there have been another, more profound method

of moving these megalithic stones into place?

And if so, how could such an advanced engineering feat

have been accomplished without the help of modern machinery?

CHILDRESS: How these massive blocks of granite

were moved from their quarries and brought here to Puma Punku

would have required some kind of super technology.

Levitation and antigravity,

huge lifting vehicles--

something that ancient aliens would have had.

NARRATOR: Might the ancient city of Puma Punku

really have been built by alien beings,

as ancient astronaut theorists contend?

And if so, for what purpose?

Perhaps by piecing together the precision-cut blocks,

profound new possibilities will be revealed.

NARRATOR: January, 2011.

Researchers survey and measure the monolithic stones

and H-blocks scattered around the archeological site

of Puma Punku, hoping to solve

the mystery of what these structures were used for

and why.

TSOUKALOS: The evidence that something extraordinary

happened at Puma Punku

is in front of our very eyes,

because at Puma Punku,

we find evidence of stone cuts

that we today could only replicate

if we used the most sophisticated of technologies.

FOERSTER: That is part of the great mystery of Puma Punku.

It seems as though some kind of factory was set up there

to make these almost exactly the same.

It's almost like a Lego system of interconnecting blocks

and that is unique on this Earth.

ERICH VON DÄNIKEN: Many of the blocks

were prefabricated blocks.

Prefabricated blocks means planning.

You have to make a design.

Planning means writing.

Now the archaeologists say that Puma Punku

are the ruins of temples made by the Aymara.

Aymara are the highland Indians up there.

But the Aymara were Stone Age people.

They had not even writing.

So not planning, it's absolutely impossible.

Prefabricated blocks in Stone Age

doesn't fit with Stone Age.

And the precision of the blocks is absolutely baffling.

NARRATOR: In Danville, Illinois, toolmaker Chris Dunn

uses measurements taken at Puma Punku

to create a one-eighth-scale model of an H-block

to better understand

how they may have originally fit together.

So you actually went to Puma Punku

to measure the H-blocks.

What was your conclusion?

What did you find?

For me, it was important

to find out what the measurements were.

Uh, what I found was that the internal cavities

were not parallel to each other.

And by internal cavities,

you're referring to these two parts right here, right?

-Exactly. -Mm-hmm.

These two surfaces right here,

both top and bottom, uh,

they are smaller at the front

than they are at the back.

TSOUKALOS: Essentially suggesting a dovetail.

-DUNN: Creating a dovetail. -TSOUKALOS: Mm-hmm.

Why do you think a dovetail shape was carved or used?

Really, if we look at the way we have used dovetails,

we use them for mechanical purposes.

To hold things together.

So essentially what I'm saying is that they were

using these H-blocks for a mechanical purpose.

Probably to hold hinges for a door.

NARRATOR: To test his theory, Dunn created a door hinge

that would connect to a small-scale model H-block.

DUNN: So if we put this together, we put the one in the bottom.

Like so.

One in the top part.

Like so. And then...

this piece fits in there.

Put a hinge pin in it.

And now you have your hinge.

TSOUKALOS: Yeah, I mean, i-it's absolutely spectacular.

And of course, the most fascinating question is,

what tools were used 5,000 years ago?

Because something very sophisticated was used.

And not chicken bones.

Not chicken bones, not, uh,

copper chisels, not, uh, stone chisels.

The tools that were used to create these blocks

at Puma Punku do not exist in the archaeological record.

NARRATOR: According to Dunn,

the H-blocks may have been used to mount

hinges for a massive door,

perhaps for one of the largest temple complexes

in the ancient world.

TSOUKALOS: It's a spectacular discovery that Chris Dunn made.

This lends a whole new meaning

to the H-blocks at Puma Punku

because, possibly, they held something in place.

The question is what?

Puma Punku is definitely

one of the most mysterious sites on Earth.

And it's really clear those blocks

were made to fit together.

MARTELL: Yeah, you know but there's sites all over the world

-that still defy explanation. -Yeah.

I know one of my most favorite sites would have to be Malta.

Megalithic structures that are some of the largest on Earth.

And some of the oldest, and there's evidence

that the builders knew the science of acoustics.

And that might give us a clue

about how these megalithic sites were built.

Yeah. Possibly acoustic levitation.

NARRATOR: Malta.

A small island nation in the center of the Mediterranean Sea

just south of Italy.

Scholars believe the first inhabitants migrated here

from the nearby island of Sicily in 5200 BC.

Today, stone structures on the Maltese island of Gozo

are considered by archeologists

to be among the greatest achievements by ancient builders

anywhere in the world.

The temples on Malta and Gozo

are more than 1,000 years older than the pyramids of Egypt.

They are the earliest monumental architecture in the world.

There are engineering features

in these temples that are just astonishing.

We're talking about walls enclosing space...

paved walkways.

They were ceilinged at one time.

Definitely much more complex than anything else

that was appearing on Earth for a very long time.

NARRATOR: Built before metal tools or the wheel had been invented,

experts are baffled by the sheer scale of the construction

and the use of vertically arranged monolithic stones,

each weighing over 20 tons.

FLANAGAN: It's only been in recent years

that we've developed instruments

that are accurate enough to appreciate

that some of these ancient societies

were able to shape stones

to optical accuracy.

Optical accuracy greater than what we're able to do today.

And so they must've had some kind of advanced technology

in able to do that.

But if the ancient builders of Malta

had used advanced technology,

where did it come from?

Researchers believe answers may be found

among Malta's numerous mysteries,

including the so-called cart ruts

which can be found all over Malta.

ENEIX: These parallel incisions in the bedrock

have been identified as cart ruts

because that's what they look like.

What they really were,

what their purpose was,

we don't know.

There's nothing written.

ARLAN ANDREWS: The cart ruts on Malta

are about four feet wide.

They're uniformly spaced.

Some of-of them run hundreds of yards.

Some of them run miles.

According to the studies on them,

they probably were there up to 10,000 years ago,

because some of the ancient temples

are built right on top of the, uh, ruts.

NARRATOR: Ancient astronaut theorists believe

the cart ruts may in fact be evidence

that Malta was one of Earth's earliest industrial work sites.

It seems like what these cart ruts really were

was some kind of ancient, uh, railway.

And this railway was then to move heavy machinery,

much as we would use today in a mining operation.

Even the way rockets are rolled out onto a launchpad.

NARRATOR: Further evidence of the use of advanced technology on Malta

can be found underground.

In 1902, construction workers,

while building the foundation for several houses,

accidentally discovered

a mysterious underground sanctuary

dating to 2500 BC.

Called the Hypogeum,

the subterranean structure

was revealed to be three levels deep,

all hewn from solid stone.

ENEIX: It's been estimated that they removed

more than 2,000 tons of stone from these subterranean chambers

to create a space that beautifully replicates

the temples aboveground.

NARRATOR: Perhaps one of the greatest mysteries

concerning the Hypogeum

involve the acoustical properties

in what is called the Oracle Room.

ANDREW COLLINS: The acoustical properties within this

are absolutely extraordinary,

because what happens is the-- if a person

is within the Oracle Room,

the-the way that their voice is carried

is heard within the whole of the complex.

HENRY: The ancients were using this profound sound technology

in order to put themselves into a deep state of trance

in order to access higher human consciousness.

They wanted to go deep within

in order to connect themselves with star energy.

NARRATOR: Might the Oracle Room have been used

to communicate with ancient gods...

...or perhaps celestial ancestors?

Or do its advanced acoustics suggest

that early Maltese people

had mastered the science of sonic manipulation,

the ability to manipulate solid matter

through audio frequencies?

FLANAGAN: One of the main things that I've realized

is that they're using something

called fractal nonlinear resonance.

And we're now discovering in the field of material science

that nonlinear resonances of sound waves,

microwaves, magnetic waves,

that we are able to actually change matter in ways

that we never dreamed possible.

NARRATOR: If the Oracle Room

was used to harness the power of audio waves,

as many ancient astronaut theorists believe,

is it possible the prehistoric builders

used sonic technology

to help build Malta's mammoth temples?

CHILDRESS: The builders had this advanced knowledge

of sonic technology.

And in fact,

sound technology can be used

for all kinds of applications,

including levitation, or antigravity.

COLLINS: All around the world,

there are myths and legends

relating to how large structures,

um, came into being.

They talk about the movement of stones

through the use of sound,

about the use of instruments,

or-or the banging, the ringing,

that will elevate stones enough so that they can be pushed

as if they've become completely weightless.

CHILDRESS: It would appear that the builders at Malta

had very advanced knowledge of things

we're just now discovering.

And you would think that they got this knowledge

from extraterrestrials.

It's very possible that what we're seeing at Malta

is some type of sound levitation technology.

And if that's true, there's many other sites

that may have been built in a similar fashion.

Right, because our ancestors

were all taught by the same teachers.

Now, if we really want to talk about acoustic levitation,

then one place comes to mind, and that's Nan Madol.

Which is truly extraordinary

because you have these giant basalt structures

in the middle of nowhere in the ocean on tiny, tiny islands.

HENRY: Yeah, I remember when we first featured it on the show,

and the locals actually said that those giant basalt columns

were actually floated through the air.

Yes, and I got to listen to these accounts firsthand

when I visited Nan Madol with David Childress

a few years later.

And, uh, let me tell you, the moment that you stand

in front of Nan Madol, in person,

it just blows your mind.

NARRATOR: The island of Pohnpei.

More than 2,500 miles southwest of Hawai'i,

completely isolated in the Pacific Ocean,

this Micronesian landmass is home to just 34,000 people,

mainly farmers and fishermen.

But there is one area of the island

that is completely uninhabited:

the lost city of Nan Madol.

The native islanders believe this ancient site is cursed...

and it is also home to some of the most mysterious

archaeological ruins in the world.

Built on a coral reef just off the eastern coast of Pohnpei

and sprawling more than 200 acres,

Nan Madol consists of 92 smaller man-made islands

connected by canals.

According to historians, this ancient city,

often called the "Venice of the Pacific,"

was the capital of the Saudeleur dynasty

that ruled from about 500 to 1628 AD.

BEARDSLEY: This ancient city housed the Saudeleurs,

the kings of that time.

So, it has their houses,

it has feasting areas, it has tombs.

So there's a whole number of areas

that each of these islets supported.

NARRATOR: Most archaeologists agree

that construction of these artificial islands

began sometime in the 13th century.

Each has been formed with columnar basalt,

a black rock that forms

when basaltic lava from a volcano

cools in the form of columns.

There are a number of columnar basalt outflows

across Pohnpei itself.

And we know of several of these outcrops

that were used to mine the basalt.

They were then transported to the area of Nan Madol

and then placed to create these small islets.

NARRATOR: But how did the native people living here 800 years ago

manage to build 92 islets out of giant basalt columns?

Researchers estimate that each stone log

used to construct the megalithic structures

weighs between five to 50 tons.

Stacked to form walls as high as 25 feet tall

and 17 feet thick,

archaeologists believe that it was an undertaking

that most likely would have required

all 25,000 island inhabitants to complete.

Around the ruins of Nan Madol are many canals,

which researchers and archeologists say

were the routes taken by boats to move these basalt columns

across and around the island

to construct the huge megalithic site.

NARRATOR: Mainstream scholars insist native people built Nan Madol

using ropes, rollers and rafts,

but attempts to prove this theory have failed.

BEARDSLEY: So, if you add up all of the stone logs,

you have a weight of 750,000 or so metric tons.

That's a lot.

If you were to move maybe

2,000 tons a year,

you might be able to get it built

over about three centuries.

We're talking about a major, massive effort here.

The kind of effort that you would see

in the construction of the pyramids in Egypt.

NARRATOR: But could there be another explanation

for how these ancient people were able to move

such massive rocks miles across the island

and into place in the ocean

without the help of modern machinery?

According to local legends,

the ancient builders

used a much more profound method of construction,

an advanced antigravitational technology

that ancient astronaut theorists believe

may explain many of the world's mysterious megalithic sites.

Some legends state that the stones were actually flown

from one part of the island to another,

or levitated some way to get them up

to such high areas of the main construction.

BRAD OLSEN: This is very reminiscent of what researchers call

auditive levitation, which was a technique

of raising heavy stones by matching

the sound frequency of matter,

rendering it weightless

and moving it into place.

TSOUKALOS: The people themselves,

who still, to this day, live there in Pohnpei, say

that this place "was not built by us.

It's been here before we arrived."

TSOUKALOS: Man, oh, man.

I mean, look how tall that is.

NARRATOR: While visiting the ancient site of Nan Madol,

ancient astronaut theorists Giorgio Tsoukalos

and David Childress,

along with their guide Gus Kohler

and structural engineer Dr. Henry Burton,

have traveled to the site of Nandauwas,

the royal mortuary said to belong

to Nan Madol's original builders.

This is supposed to be the biggest stone here

-at Nandauwas. -This corner stone right here?

This thing, it's-it's supposed to be the biggest of all

-the stones here. -TSOUKALOS: Henry,

do you think you can calculate the weight of this?

Yeah, we can certainly estimate it.

Um, I have a measuring tape, we can estimate the volume,

and we know the density, so that can give us the mass.

All right, let's do that.

BURTON: Yeah, so, this is about four meters.

All right, here's, uh, the far corner here.

NARRATOR: Using the dimensions and the density

of one of the basalt stone blocks,

Dr. Burton calculates its weight.

TSOUKALOS: 250. Two meters, 50.

BURTON: All right, so based on the measurements,

you're looking at a weight of about 54 tons.

-54 tons? -Yeah, so 50 tons, give or take.

And you have one, two, three, four

of those monoliths essentially stacked on top of each other...

-BURTON: Mm-hmm. -...at a height of 40 feet?

CHILDRESS: So, Gus, what is, then, the oral history

of moving this stone on the island?

Well, according to the legends, uh,

the stones were flown up here.

NARRATOR: For generations,

the people of Pohnpei have told the story

that Nan Madol was constructed by strange visitors

through a process of levitation.

It is this legend that has suggested

to ancient astronaut theorists

that Nan Madol is not only an ancient megalithic structure,

it is also an extraterrestrial one.

We have in the oral traditions

story about two brothers...

NARRATOR: According to legend,

the twin sorcerers who created Nan Madol

were of giant proportions,

much like the legends

of Easter Island, where it is said

that giants magically floated

the stone Moai statues into place.

Similar stories involving levitation are associated

with numerous other megalithic sights

like Stonehenge in England,

the Great Pyramid in Giza, Egypt,

the Uxmal Pyramid in the Yucatán Peninsula

and Puma Punku in Bolivia.

There are other stories around the world

that say the exact same thing...

...how gigantic stones were moved into place as if by magic.

And you have to ask yourself, is there a connection?

Did all of our ancestors receive

the same knowledge from the extraterrestrials?

And the answer to that is a resounding yes.

Okay.

CHILDRESS: They don't know.

I think they don't know where it came from.

-TSOUKALOS: Aha! -But it's-it's not from here, right?

So, yeah, 60% of the stones, they don't know

-where they came from. -That's incredible. That...

the 60% is essentially still a mystery, yes?

Huh.

NARRATOR: For decades, mainstream archaeologists have been

frustrated by their failure to identify the source

for much of the basalt used

in the construction of Nan Madol.

But recently, a growing number of scientists have

become convinced that it came from a volcanic outcropping

located 25 miles northeast of Nan Madol

called Pwisehn Malek.

The unusual formation extends over 400 feet into the air,

and, incredibly, the rock used to construct Nan Madol

appears to have been extracted

from the least accessible part of the mountain:

the very top.

But how?

According to the oral history of Pohnpei,

the basalt was taken by what the natives referred to

as "a giant bird."

There's one story that says that at some point

there were these giant roosters

that lived on top of that mountain.

And this rooster took

these basalt blocks and flew them over to Nan Madol.

Now, monster roosters do not exist.

So my mind always goes to misunderstood technology.

Machines that were provided by the extraterrestrials.

CHILDRESS: I believe that the islanders are correct

when they say all those stones were flown through the air,

because I can't see how it was done in any other way.

NARRATOR: As far as ancient astronaut theorists are concerned,

the local legends, along with hard evidence

that basalt appears to have been excavated

from the top of Pwisehn Malek,

add credence to the idea

that advanced alien technology was used

in the construction of Nan Madol.

And to help prove their theory,

Giorgio Tsoukalos and David Childress,

along with structural engineer Dr. Henry Burton,

travel 25 miles across the island

to visit the nearest basalt quarry.

TSOUKALOS: Man, look at this.

-BURTON: Wow. -TSOUKALOS: What a quarry.

So, how does one free the basalt from, from this wall?

Yeah, no, it-it would, it would certainly require

some specialized tools,

some type of excavator,

some type of drill tip.

And once you start taking rocks off,

depending on how much room

you have to drive things up, depending on the size

of the blocks, you might need a crane

to sort of move things around.

You would need some type of machinery

to be able to do that today.

TSOUKALOS: How did people

from at least a thousand years ago

remove these blocks from this quarry?

CHILDRESS: They had to somehow

pry these columns out of the cliff,

and, you know, remove them

so that they would be, yeah, stand-alone

piece of prismatic basalt

and then, and then move it,

millions of tons of it.

I would think that, yeah, there was

very much a-a special survey done of this island

looking for material

-that could be used to build. -TSOUKALOS: Right.

And I would say that an aerial survey

-would accomplish all of that. -Yes.

Yes, or any type of, you know,

advanced radar technology that, in my opinion, existed

with the extraterrestrials at the time.

NARRATOR: For Giorgio and David,

the more they learn about Nan Madol,

from the weight of the basalt columns

to the distance they had to be transported,

to the tools that would be needed to quarry the rock,

the more difficult it becomes to explain how all of this

could have been accomplished without the help

of advanced extraterrestrial technology.

♪ ♪

For me, Nan Madol ranks right up there

alongside Puma Punku and the Great Pyramids of Giza

as far as evidence

for the ancient astronaut theory is concerned.

Because we, today, would have a hard time

replicating these sites, even with modern-day technology.

And you know, the ancients tell us

that there's a much older structure under Nan Madol.

And you can see that there's still underwater columns

-at that location. -Right.

HENRY: There's sites literally all over the world

where the ancients were building impressive sites

on even more ancient,

even more impressive sites.

Look at Baalbek, for example,

where you have the Roman Temple of Jupiter

that is built on top of this platform composed

of these massive stone blocks.

And the perfection of that platform is

beyond astonishing.

NARRATOR: Eastern Lebanon.

The Bekaa valley.

Here, at this archaeological site,

stand the ruins of Heliopolis,

built in the fourth century BC

by Alexander the Great to honor Zeus.

But beneath the Corinthian columns

and remnants of both Greek and Roman architecture

lie the ruins of a site that is much, much older.

According to archaeologists,

it dates back nearly 9,000 years.

The ancient city of Baalbek...

...named after the early Canaanite deity, Baal.

HANAN CHARAF: Baal is the god of life,

the god of the sky, the god of the sun.

He was the god that was venerated

on the site of Baalbek

during the Canaanite and the Phoenician times.

ROBERT MULLINS: And so because it was already sacred to the god Baal,

then, later, the Greeks

and the Romans then would build temples

on this very same spot.

NARRATOR: Archeological surveys have revealed

that the enormous stone foundation

that lies at the base of the site

dates back tens of thousands of years.

Baalbek, as we know from the archaeological evidence,

must have existed during the Neolithic period,

between six to eight thousand years,

or even nine thousand years BC.

NARRATOR: But even more significant to ancient astronaut theorists

is their belief that the colossal stone platform

may once have served as a landing pad

for space travelers.

CHILDRESS: We don't know why

Baalbek was chosen as this specific site.

Uh, it may well be some kind of special power place.

♪ ♪

But what was originally there, before the Roman temple,

was this spaceport platform

that was apparently used for extraterrestrials

coming and going on planet Earth.

NARRATOR: As evidence, researchers point

to the gigantic megalithic stones

incorporated into the foundation,

each weighing between 800 to 1,200 tons.

And perfectly fitted together.

COPPENS: This is the real mystery of Baalbek.

How these stones came to be there,

why they were placed there and, specifically,

how they were transported into place,

because some of the stones are of such magnitude

that modern machinery is incapable of putting them there.

But somehow our ancestors were able to do this.

TSOUKALOS: Some have suggested

that this stone alone weighs

in excess of 1,200 tons.

How was it moved there?

Because, obviously, it's situated

on top of these stone rows

that we can find down here.

Which means that this stone had to be lifted

and then set on top

of these stones down here.

CHARAF: And because these stones were gigantic,

ancient people assumed

that extraterrestrial or unknown forces brought them

to the site itself.

BIRNES: It is one of the oldest,

oldest megalithic sites on the planet.

And it has these huge stones laid out

in a precise geometrical shape

at a time

when the prehistoric people who would've lived there,

who would've gone to the Beqaa Valley in Lebanon,

would have no concept of how to move stones of that nature.

NARRATOR: But if the moving, hoisting and setting

of such massive stones was so incredibly difficult,

then who, or what, placed them there?

And perhaps more importantly, why?

We know that the ancients always went to power places,

and Baalbek, clearly, is one of them.

It is a place where the gods were worshipped,

where the gods were said to be present.

And so, when it comes to Baalbek,

this platform was built there for a reason.

For what purpose it was used is a question

we can't answer at this moment in time.

But what we do know is that whatever was happening there

had a great religious significance to them

and was linked with worshipping deities.

Deities which clearly are of an otherworldly origin.

You know, it is awesome

that we now have over 250 episodes

of Ancient Aliens, in which we've featured

some of the most magnificent megalithic sites.

And what's also cool is that a lot of these sites

that we've featured are megalithic places

that most people haven't even heard about beforehand.

And they're not all ancient, either.

I mean, one of my favorite,

or most fascinating megalithic sites...

-Yeah. -...is Coral Castle in Florida,

-and it was built in the 1920s. -Mm-hmm.

MARTELL: And it was just done by one person.

-Ed Leedskalnin. -MARTELL: Yeah, and you know,

Ed claims that he knew the secrets of the pyramids.

And whether you believe him or not,

Coral Castle exists.

You can visit it to this day.

So it's possible we have this megalithic site in Florida

that was built with an extraterrestrial technology.

Mm-hmm.

NARRATOR: Homestead, Florida.

30 miles south of Miami.

This former agricultural town

is home to one of the most mysterious structures

in North America, a stone garden

made of sculpted blocks of ancient coral,

some weighing 30 tons.

It's called the Coral Castle.

Spread over several acres,

the complex formations and intricate designs

of the stone walls and sculptures marvel tourists.

But unlike other great structures around the world,

this site is not ancient.

CHILDRESS: Coral Castle in Florida

is often said to be, uh, the only modern

megalithic structure ever built.

NARRATOR: In 1923,

Ed Leedskalnin, a Latvian immigrant,

began building what he originally called

Rock Gate park.

But believe it or not, Leedskalnin insisted

that he was not using modern machinery

to build the impressive structure.

He also claimed that he was working alone.

McCLURE: Well, Ed was a hermit

and Ed was a loner

and he was a foreigner

and he was a recluse

and a scientist.

NOORY: He was in love with a woman

and he wanted to build this facility in memory of her.

And he waited for her to come from Europe,

and he waited and he waited, and she never did.

But the big question is,

is how did this frail little man move

these thousands of pounds of block by himself?

NARRATOR: Barely over five feet tall

and weighing just 100 pounds,

Leedskalnin is said to have carved, moved and hoisted

huge multiton stones using only a makeshift tripod.

McCLURE: He has a tripod-- three pieces of Florida pine--

and he's got some chains,

and he's now gonna lift 30 tons.

Ten tons of rock.

Can't be done. No one could do that.

NOORY: He would work at night.

He wouldn't let anybody watch him.

And he said that he knew the secrets of the pyramids.

NARRATOR: But what exactly was Leedskalnin referring to?

Had he rediscovered the same advanced technology

used to build megalithic structures

like Carnac and Sacsayhuamán?

McCLURE: Ed, over and over again,

would tell people that he knew the secrets

that helped the Egyptians build the pyramids.

What was he talking about?

Why was he constantly harking back to the Egyptians?

We don't know.

NARRATOR: Leedskalnin continued work on the Coral Castle

until his death in 1951.

In the journals he left behind,

the builder explained that he had discovered

the ancient secret of transforming stones

into weightless objects.

McCLURE: Ed says this in his pamphlet Magnetic Current,

that real gravity is actually real magnet.

So if you reverse the magnet forces

with a force of

some kind of electromagnetic radio-- perhaps-- frequency,

you can then make these rocks

not as heavy as they seem otherwise,

and therefore, you can lift them.

NARRATOR: But if Leedskalnin

had developed a device that could modify gravity...

...what was his secret?

Some suggest the answer lies in a mysterious black box

that can be seen in various photographs.

A box that has since disappeared.

McCLURE: The black box sitting on top

is the element that no one has ever seen,

except in those pictures, and no one has today.

We believe that black box has something to do

with how he got these massive,

heavy, brittle pieces of rock up in the air

in a way that no one can duplicate.

NOORY: He had some kind of magnetic machine

down in one of his other house areas

that has since been dismantled.

But it had a revolving ability.

He may have been having that thing spin.

The whole place could have been antigravity.

He probably just pushed these into place.

SARA SEAGER: Levitation is the only way that I know of

to hold up very heavy objects.

Very, very high-speed trains are magnetically levitated.

These high-speed trains

don't have wheels that touch any tracks.

They're literally suspended above the track

using magnetic forces.

BRANDENBURG: We can speculate at this time

that there are techniques

for using electromagnetism to nullify gravity.

Uh, this was the great quest of Einstein.

The motivation for such technology is, of course,

to lift a large spaceship out into space

and across space.

-ASTRONAUT: Oh, we have arrived. -(laughter)

(indistinct comm chatter)

NARRATOR: Could it be that Ed Leedskalnin

utilized antigravity to levitate and distribute

the enormous rocks used to build Coral Castle?

If so, where did this incredible knowledge come from?

COPPENS: And he died, taking this secret to his grave.

The question is, did he invent it?

Or did he himself somehow inherit it

or learn it from a tradition

or maybe from some visitor from another realm?

McCLURE: The only thing that is explainable

is that someone with a higher form of physics

and understanding of gravity

has created the ability of one person to lift stones

that modern technology could not do the way he did it.

It had to come from a different place in this galaxy.

TSOUKALOS: The fact that one guy

created these massive structures is absolutely fascinating.

Am I suggesting that he did this

with extraterrestrial technology?

No, because I don't know.

Am I excluding that possibility? No.

NARRATOR: If aliens visited Earth in ancient times,

perhaps the world's unexplained structures

provide clues to unlocking

not only the secrets of our past...

...but a glimpse into our future.

VON DÄNIKEN: I think that extraterrestrials

would not have left our solar system

some thousands of years ago without any proof.

They wanted that, in the far future,

we start to reflect,

"Have we been visited by outer space?"

Worldwide, on every continent,

the most ancient of structures all essentially feature

the same type of masonry, or stonework.

And you can't just attribute this to coincidence.

Either our ancestors all went to the same school

or they were visited by the same teachers.

MARTELL: The ubiquitous knowledge seems to be coming from

either one source or a shared source

that is influencing the whole globe.

HENRY: Humanity has had a hidden past

where we were building these megalithic structures

by unknown means.

But now, we're starting to develop

is a more accurate picture of this megalithic civilization

that was global, that was highly advanced, intelligent,

probably working with extraterrestrials,

and now we're beginning to learn the true purpose

of those megaliths.

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