Ancient China from Above: Secrets of the Great Wall

[43:51; 2020; English]
A National Geographic documentary series takes viewers back in time to see aerial footage of how earlier landscapes in China were shaped, including the Great Wall, Kublai Khan's legendary lost city and a newly-discovered city from 4,000 years ago.

In this episode, Dr Allan Maca investigates the biggest manmade structure on earth; The Great Wall of China.