Great Pyramid of Giza Unsolved Mysteries Ancient Egypt Ancient Egypt was a civilization of ancient North Africa, concentrated along the lower reaches of the Nile River, situated in the place that is now the country Egypt. The Great Pyramid of Giza The Great Pyramid of Giza is the oldest and largest of the three pyramids in the Giza pyramid complex bordering present-day Giza in Greater Cairo, Egypt. It is the oldest of the Seven Wonders of the Ancient World, and the only one to remain largely intact. Orion correlation theory The basis of this theory concerns the proposition that the relative positions of three main Ancient Egyptian pyramids on the Giza plateau was by design correlated with the relative positions of the three stars in the constellation of Orion which make up Orion's Belt, as these stars appeared in 10,000 BC. Star Shaft Theory Badawy suggested that the shafts pointed to Orion's Belt during the period of the construction of the Giza pyramid complex. It is thought that these openings were perhaps "air vents" for mummies or built to point to certain stars at the date of the pyramids construction. Pyramid Power Plant Theory Pyramid power refers to the belief that the ancient Egyptian pyramids and objects of similar shape can confer a variety of benefits. Dendera light The Dendera light is a motif carved as a set of stone reliefs in the Hathor temple at Dendera in Egypt, which superficially resemble modern electric lighting devices.