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.
| Title | Secret History - Season 14 Episode 4 The Great Wall of China: The Hidden Story |
|---|---|
| Year | 2017 |
| Genre | Documentary |
| Country | United Kingdom |
| Studio | Channel 4 |
| Cast | |
| Crew | |
| Alternative Titles | |
| Keyword | |
| First Air Date | Nov 14, 1991 |
| Last Air date | Nov 12, 2017 |
| Season | 17 Season |
| Episode | 117 Episode |
| Runtime | 26:14 minutes |
| Quality | HD |
| IMDb: | 7.00/ 10 by 1.00 users |
| Popularity | 9.953 |
| Language | English |
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