Photo: Courtesy of Rindge Leaphart
The Great Wall of China, the world’s largest man-man structure, is even larger than previously thought. The series of fortifications built as early as 500 BC and eventually joined actually spans 13,173 miles — more than double the 5,500 miles the Great Wall had been estimated at by a 2009 survey, The Telegraph‘s Malcom Moore reports.
The finding comes from a survey by Chinese archaeologists, beginning in 2007, to map every section of the wall, even portions that are no longer intact.
Earlier estimates were mostly based on historical records, according to the BBC.
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