Ancient China from Above - Episode Guide

The Great Wall of China is an icon of the ancient world. But only now, thanks to cutting-edge technology, are its secrets finally being revealed.

Many believed the lost city of Xanadu was a myth, but with cutting-edge technology, Dr. Allan Maca brings Kublai Khan's legendary city back to life.

With new technology, Allan Maca explores a lost ancient megacity that 4,000 years ago was one of the biggest on the planet. But why did it disappear?