Ancient Megastructures

3/26/2011

The Great Pyramid of Giza is 4,500 years old. It's the only ancient wonder of the world still standing. To cut and move the 2 million stones needed to build it would involve the whole Egyptian state.

3/12/2011

Building the Chartres Cathedral pushed construction techniques to the limit, but behind this engineering triumph lies a dark story of violence, political double-dealing and destruction.