In part two of this Hidden Planet episode, Inside the Pharoah's Secret Tunnels, Richard Engel journeys into the Great Pyramid of Giza in Egypt, the oldest of the seven wonders of the ancient world.
The pyramid's construction began in 2589 B.C., shortly after the 20-year-old Pharaoh Cheops ascended to the throne. Cheops' burial place turned out to be the biggest one in history.
Engel climbs through the hidden chambers and passageways of the ancient pyramid, revealing secrets about the largest pyramid of the Giza Necropolis and the pharoah it was constructed for.
Editor's note: New editions of Richard Engel's 'Hidden Planet' premiere monthly on the Rock Center iPad app. Download the app here.