World-class Tiankeng in Napo Country, Guangxi

A new Tiankeng (a Chinese term meaning karst doline) Group, consisting of 19 dolines, was discovered in Napo County of Guangxi, which is mainly distributed in Chengxiang Town and Longhe Township. This is another world world-class Tiankeng discovered in China after the Dashiwei Tiankeng Group in Guangxi and Hanzhong Tiankeng Group in Shanxi. With more-than-one-million-cubic-meter volume, the doline is well preserved and has high scientific research and tourism development value. In addition to Tiankeng group, there are many types of karst geological relics in the underground river basin, such as karst caves, karst gorges, volts and waterfalls.