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Three Natural Bridges29°26′02″N 107°48′05″E / 29.433863°N 107.80128°E  The Three Natural Bridges (simplified Chinese: 天生三桥; traditional Chinese: 天生三橋; pinyin: Tiānshēng Sān Qiáo) are a series of natural limestone bridges located in Xiannüshan Town (仙女山镇), Wulong District, Chongqing Municipality, China.[1] They lie within the Wulong Karst National Geology Park, itself a part of the South China Karst-Wulong Karst UNESCO World Heritage Site.[2] In Chinese, the bridges are all named after dragons, namely Tianlong (Chinese: 天龙桥; lit. 'Sky Dragon') Qinglong (青龙桥; 'Azure Dragon') and Heilong (黑龙桥; 'Black Dragon').[3][4] Description  Three Natural Bridges  Yuzhong Three Natural Bridges (Chongqing)  Spanning the Yangshui River, a tributary of the Wu River, the bridges are at the centre of a 20 km2 (7.7 sq mi) conservation area which also includes:
Given that the distance between the upper end of the Tianlong Bridge and the lower end of the Heilong Bridge is only 1,500 m (4,900 ft), these are not the longest natural bridges. Between the bridges lie the Qinglong and Shenying tiankengs which have a depth of 276–285 metres and a circumference of 300–522 metres. Dimensions
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