Cosmic rays and photos from an endoscope have revealed a "hidden" corridor inside the Great Pyramid of Giza's north face, above the pyramid's ancient entrance, new research finds.
The Great Pyramid was built on orders of the pharaoh Khufu (ruled circa 2551 B.C. to 2528 B.C.) on the Giza plateau and today is about 456 feet (139 meters) high. It is the only surviving wonder of the ancient world and was the tallest building on Earth until 1311, when England's Lincoln Cathedral's 525-foot-tall (160 m) central tower was completed.
A new study reveals that, just above the ancient entrance to the pyramid, there is likely a horizontal chamber that runs for 30 feet (9 m) in length and is 6.6 feet by 6.6 feet (2 by 2 m) in width and height. It is located behind a chevron-shaped structure that is visible outside the pyramid, according to the study, published Thursday (March 2) in the journal Nature Communications(opens in new tab).
