Secret History

Season 14 Episode 4: The Great Wall of China: The Hidden Story

With access to the first nationwide survey and state-of-the-art drones mapping the Great Wall of China, this documentary offers new evidence that reveals its extraordinary magnitude, rewrites its millennia-long history and decodes its complex signals system. Using cutting-edge chemistry, the programme also finds out what has kept the wall standing for so long - a simple cooking ingredient found in kitchens across the world.

Genre:

Documentary

Seasons:

18

Episodes:

130

Cast:

Quality:

HD

Duration:

-

First Air:

1991

Rating:

8.5