The oldest of the Seven Wonders of the Ancient World and the only one remaining intact, the Pyramids of Giza were built in 2560 BCE to entomb Pharaohs Khufu, Khafre, and Mendaure. All three pyramids were plundered in ancient and medieval times, leaving few clues behind. Despite their large size, there are no hieroglyphic texts, treasures, or mummies inside. They are mostly solid masses of stone with a few passageways that lead to small burial chambers underneath each pyramid.
The question of how the pyramids were built continues to stump archaeologists. Situated on a rocky plateau on the west bank of the Nile River in northern Egypt, they are still enshrouded in mystery. Many theories abound, but none are universally accepted.