This is incredible 😮 check this out #greatwallfact #china #greatwall

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The longest wall of the Great Wall is approximately 2,145 miles. Additionally, about 1,770 miles branch from the sides, making it the longest man-made structure in the world by far. The length of all Chinese defense walls built over the last 2,000 years is approximately 31,070 miles. To put this into perspective, it could circle the world two times.

Source: http://mysticalroads.com/great-wall-of-china/