What would it cost to make a modern Great Wall of China? The original wall took an estimated 2,000 years and once spanned over 13,000 miles. Now only 4,500 miles are still standing. It came at an incredible cost-- not just money, but also the lives of labourers. Some estimates say more than a million workers are buried along the wall. The World Wonder was built using innovative forms of construction, like mortar made from sticky rice, transportation via goats and donkeys, and “flying baskets.” A modern wall would definitely be easier to build but it would be harder to secure permission to create such an epic structure across multiple territories. Like the original wall, a modern Great Wall of China would cost billions of dollars.