Secret History - Season 14 - Eps 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.
About Secret History
Title: Secret History
First Air Date: 1991-11-14
Last Air Date: 2017-11-12
Status: Returning Series
Rating: 7/10 (from 1 votes)
Language: EN
Seasons: 18
Total Episodes: 117
Network: Channel 4
Genres: Documentary
Production Companies: 3BM Television
Synopsis
Secret History was a long-running British television documentary series. Shown on Channel 4, the Secret History brandname was used as a banner title in the UK, but many of the individual documentaries can still be found on US cable channels without the branding. It can be seen as Channel 4's answer to the BBC's Timewatch.
