Beneath the pyramids of Egypt lies a lost underworld of catacombs, hewn chambers and cave tunnels that have remained unexplored for hundreds of years. They are alluded to in ancient texts and Arab legends, but have been left unexplored until today. They have now been rediscovered and investigated for the first time. What exactly does this subterranean realm tell us about the pyramids, their relationship to the stars and the mythical origins of Egyptian civilization? Discover for yourself as we explore the "Lost Caves of Giza."

http://youtu.be/LTEVvkL-l3Q