The South China Karst (simplified Chinese: 中国南方喀斯特; traditional Chinese: 中國南方喀斯特; pinyin: Zhōngguó Nánfāng Kāsītè), a UNESCO World Heritage Site since June 2007, spans the provinces of Chongqing, Guangxi, Guizhou, and Yunnan. It is noted for its karst features and landscapes as well as rich biodiversity. The site comprises seven clusters Phase I: Libo Karst, Shilin Karst, and Wulong Karst inscribed in 2007, and Phase II: Guilin Karst, Shibing Karst, Jinfoshan Karst, and Huanjiang Karst inscribed in 2014. UNESCO describes the South China Karst as "unrivalled in terms of the diversity of its karst features and landscapes".
The huge karst area of South China is about 550,000 km in extent. The karst terrain displays a geomorphic transition as the terrain gradually descends about 2000 meters over 700 kilometers from the western Yunnan-Guizhou Plateau (averaging 2100 meters elevation) to the eastern Guangxi Basin (averaging 110 meters elevation). The region is recognized as the world’s type area for karst landform development in the humid tropics and subtropics.