No one is sure exactly how long the Great Wall of China is. Many say that the Great Wall extends some 3,700 miles (6,000 kilometers). But, of course, the Great Wall is not actually a single wall but a series of disconnected walls. Snaking along the hills in the southern part of the Mongolian plain, the Great Wall (or Walls) were built over centuries, beginning as early as 500 BC. During the Qin Dynasty (221-206 BC), many walls were joined and re-enforced for greater strength. In places, the massive walls are as tall as 29.5 feet (9 meters).
Learn About the Great Wall of China:
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- Facts About the Great Wall of China
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