Secrets at the Great Wall

August 18, 2019
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If We Built It Today - S1 - E6

Secrets at the Great Wall

The Great Wall of China is one of the world's greatest engineering marvels, and it took dangerous, cutting-edge construction to build it. Experts use the latest tech and modern-day science to reveal if building it a second time would be just as deadly.

If We Built It Today: Season 1 - 9 Episode s


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