NARRATOR: Cairo, Egypt, April 2018--
during his first visit to Egypt in nearly two decades,
ancient astronaut theorist Giorgio Tsoukalos
is eager to find out about a recent discovery concerning
a possible hidden chamber located deep inside the walls
of the Great Pyramid of Giza.
This way.
NARRATOR: With him are egyptologist
Ramy Romany and archaeoastronomer Dr. Giulio
Magli.
They are making their way to what is called, the Grand
Gallery, which can only be reached after walking
up a 200-foot long passageway.
Directly above their heads is the area
where an international team of scientists
believe they may have located an enormous hidden chamber, more
than 100-feet long.
So this is it, the Grand Gallery.
If you look at this and you think,
they made this more than 4,000 years ago.
They actually built this.
This is incredible.
From here to the ceiling is about 10 meters high.
And it goes about 50 meters in, which is 150 feet deep.
I mean, that just gives you an idea of how huge this place is.
And it's perfect.
The blocks, they fit together, and no mortar was used.
And you can't even put a money bill in between the fittings.
And this is what type of stone that we're looking at in here.
Unlike the rest of the pyramid, this is red granite.
GIORGIO TSOUKALOS: Red granite, right.
RAMY ROMANY: Red granite doesn't come from a local quarry
like the limestone does.
GIULIO MAGLI: It comes from Aswan.
Aswan.
So that's 1,000 kilometers away.
RAMY ROMANY: 1,000 kilometers away.
GIORGIO TSOUKALOS: 600 miles.
So you think the void is right on top of our heads here?
And how big is it in relation to where we're standing?
OK, wow.
NARRATOR: The news of a possible fourth chamber
within the Great Pyramid has become
a source of great controversy inside
the archaeological community.
They have long held the belief that pyramids were essentially
built as burial vaults, each possessing
no more than three chambers.
Archaeologists and egyptologists claim that they
were tombs for the pharaohs.
And yet no Egyptian pharaoh was ever
found in a pyramid in Egypt.
[music playing]
We have found the mummies of many Egyptian pharaohs.
But they're found in vaults, deep underground
at the Valley of the Kings in Luxor, hundreds of miles away
from the pyramids.
The pyramids, they have no real explanation
of what their purpose was.
When we found this pyramid, there was no mummy.
There were no treasures, no nothing,
no hieroglyphics, nothing.
What if all this that we're looking at is a decoy?
You just raised a very interesting point.
The fact that we've come so far into this chamber,
and the entire way, not a single hieroglyphic.
Because throughout the rest of Egypt,
the walls are plastered with inscriptions,
telling the story of how it was built and by whom and when.
Yet here, so far, complete anonymity.
Absolutely.
NARRATOR: Because the walls inside the Great Pyramid
contain no hieroglyphics and there is no evidence
that the colossal structure was ever used as a tomb or temple,
there has been increasing speculation
as to its original purpose.
One theory, held by numerous scientists
and archaeo-engineers, is that the pyramid and others like
it may have been built as one in an enormous network of power
plants.
[music playing]
Christopher Dunn's theories indicate
that some of these pyramids had chemicals mixed in them.
And in fact, studies of his working devices
have shown that this probably would work.
[music playing]
CHRISTOPHER DUNN: Pyramids were actually geomechanical devices.
In other words, they were attached to the earth.
They were tuned to vibrate with the frequencies of the earth.
And they converted the energies of the earth
into electromagnetic energy.
The best example of this is in the Great Pyramid.
It's probably the most precise structure on the planet.
NARRATOR: According to Christopher Dunn's theory,
the process of generating energy began
with drawing water from the nearby Nile River
to the base of the Great Pyramid.
Right in front of the door of the--
entrance door of the great pyramid,
there used to be a well shaft, which was documented in 1857.
And so the water would just gravity
feed down into, basically, a moat around the Great Pyramid
and then go down the entrance shaft, down into the ground.
SPEAKER: The water was used in the subterranean chamber.
It is a water pump.
I believe the water was used to cause a compression wave
and cause the pyramid to resonate.
CHRISTOPHER DUNN: So in the queen's chamber,
two chemicals were introduced-- hydrated zinc
through the northern shell and a dilute hydrochloric acid
through the southern shell.
This vessel represents the queen's chamber.
[music playing]
Into the tubes, we're going to pour hydrated zinc
and then hydrochloric acid.
When you bring these two liquids together,
a chemical reaction occurs.
And a product of that chemical reaction
is hydrogen. And you can see the vapor,
the hydrogen escaping through the chimney.
And there you have the reaction.
NARRATOR: Adding credibility to Chris Dunn's remarkable theory
is the fact that traces of both zinc and hydrochloric acid
have recently been found in the shafts leading to
the so-called queen's chamber.
But if the pyramid was really designed
as a gigantic power plant, how was that power applied?
CHRISTOPHER DUNN: We can come up with all kinds of devices
to power with that kind of energy,
from simple domestic appliances to highly advanced spacecraft.
NARRATOR: Might the Great Pyramid of Giza
have been designed as part of an enormous network
of ancient power plants, not 4,000 years ago
but much, much earlier?