This episode follows new investigations at the Great Wall of China that reveal the ancient secrets of how - and why - it was built. The Great Wall of China is the biggest man-made structure on the planet, an epic fortification, built to protect one of history’s greatest empires. Constructed over many centuries from over a billion tons of brick, stone and earth, this wall is an estimated 20,000 km long.
Secrets Unearthed Great Wall Of China was broadcast on SBS ONE at Tuesday 6 September 2022, 05:00. This episode was initially placed on Friday 13 November 2020.
