This deep pit in the pyramid’s subterranean chamber remains one of Egypt’s greatest archaeological puzzles. Could it be a secret passage or a symbolic structure?

An often overlooked pyramid in Mexico was filled with pools of a rare element in its underground chambers, leading to new theories that the structure may have had a shocking hidden purpose.

Hidden chamber discovered in Great Pyramid of Giza 02:51. Using the advanced technique, which "detects cosmic radiation passing through the pyramid, allowing the authors to determine the size of ...

They Can't Explain its Purpose—Yet. Archaeologists Discovered a 2,200-Year-Old Pyramid. The site may have started as a guard tower to protect a road and collect taxes, but experts aren’t certain.