How Was The Great Wall Of China Built? | Blowing-Up History: Seven Wonders

The Great Wall Of China was built to protect a growing empire and the Silk Road that brought in wealth, but how exactly was the wall built? 🇬🇧 Catch full episodes of your favourite Discovery Channel shows on discovery+: https://bit.ly/2PMvvS6 Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK