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istockphoto.com

Gorgeous hues adorn Beijing in the fall and the forests surrounding nearby sections of the Great Wall of China. It was placed on the World Heritage List by UNESCO in 1987. It is approximately 13,170 miles long. The landmark was continuously built from the 3rd century BC to the 17th century AD. Those of you looking for a challenge, run one of the most famous half marathons in the world that this attraction hosts.