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中国的长城卫星地图 (世界奇迹指南)

http://en.wikipedia.org/wiki/Great_Wall_of_China (Eastern end placemarked) The Great Wall of China (TC: 長城; SC: 长城, Pinyin: Chángchéng), also known in China as the Great Wall of 10,000 Li1 (SC: 万里长城, Pinyin: Wànl? Chángchéng), is an ancient Chinese fortification built from the end of the 15th century until the beginning of the 16th century, during the Ming Dynasty, in order to protect China from raids by the Mongols and Turkic tribes. It was preceded by several walls built since the 3rd century BC against the raids of nomadic tribes coming from areas now in modern day Mongolia and Manchuria. The Wall stretches over a formidable 6,700 km (4,200 miles), from Shanhai Pass on the Bohai Gulf in the east, at the limit between China proper and Manchuria, to Jiayu Pass (嘉峪关) in western Gansu province in the west, at the limit of the Gobi Desert and the oases of the Silk Road.