This photo taken on October 20 shows the sun setting over the autumn colours of a section of the Great Wall of China at Jinshanling, Hebei Province. 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. AFP PHOTO/Mark RALSTON (Photo by Mark RALSTON / AFP) (Photo credit should read MARK RALSTON/AFP/Getty Images)
Getty Images

AFP MARK RALSTON