What would a quiz about the Seven Wonders of the World be without a question on the Great Wall of China, which originally ran what length?

Known as the "Long Wall of 10,000 Li" in Chinese, only under 20 percent of the Great Wall of China is still intact. That means only around 2,600 miles of the once 13,171-mile-long wall remains.

Last updated 4 years ago · 9.4K views · SOURCE