Ed Jones / AFP - Getty Images

Rain clouds pass over a section of the Great Wall at Jinshanling, Hebei Province on Sunday, June 10.

According to a recent BBC News report, the wall, which is a series of fortifications made of stone, brick and rammed earth, was subject to a recent archaeological survey that found its total length to be 21,196 km or 13,171 miles. Based on a 2009 study, it was thought to be much shorter at 8,850 km. The Great Wall, which was built in 500 BC to protect China's northern border, is the world's largest manmade structure. Read more.

Ed Jones / AFP - Getty Images

A tourist walks over a section of the Great Wall at Jinshanling, Hebei Province on June 10.

Ed Jones / AFP - Getty Images

Tourists look out from a section of the Great Wall at Jinshanling, Hebei Province on June 10.

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Luckily, the pooch wasn't in any serious danger and could breathe OK, officers determined when they arrived at 12:30 p.m. (But we're sad to say that, yes, that red stuff in the photo is blood; Rebel injured his "eyebrows" a bit while thrashing around as he tried to free himself.) 

See the full post here to read how Rebel was freed.