And so there's a whole counterpart to the pyramids, which are lost, like a kind of a City ... of the Giza Plateau, and it became a very hard foundation that eons later the pyramid builders would ...

Standing at the base of the pyramids at Giza it is hard to believe that ... look at the Great Pyramid and don't opt out for lost civilizations, extraterrestrials, or hidden technologies.

At 140m (460 feet) in height, it is the largest of the Egyptian pyramids located at Giza ... the builders left to protect the very narrow roof of the Grand Gallery from the weight of the pyramid ...