Shuanghedong Cave Network

Shuanghedong (Shuānghédòng, lit. 'twin rivers cave') is the longest cave in China and in Asia, the largest dolomite cave system in the world, and the third longest cave in the world as of May 2023. Its current explored length is 437.4 kilometres (271.8 mi). The cave network is located in Suiyang Shuanghe Cave National Geopark, near the town of Wenquan in Suiyang County, Zunyi, Guizhou Province. It is situated within the Furong River basin, a primary tributary of the Wu River. The cave is a UNESCO World Heritage Site.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).