Great Wall of China
Great Wall of China Defensive frontier and world heritage site, c.2400km (1500mi) long, extending from the Huang Hai (Yellow Sea) to the Central Asian Desert, n China. It is an amalgamation of fortifications constructed by various dynasties. The Warring States built the first sections of the wall. In 214 bc, Qin Shihuangdi ordered that they should be joined to form a unified boundary. The present wall was mostly built 600 years ago by the Ming dynasty. It averages 7.6m (25ft) high, and is up to 9m (30ft) thick.
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Great Wall of China
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Great Wall of China