San Wang Dong

San Wang Dong is a large karst cave in the Wulong Karst formation region, located within Wulong County of Chongqing Municipality in China.

The current known combined length of its passages is 67,825 metres (222,523 ft) long.

[1] San Wang Dong has numerous large cave rooms and passages, many of which are almost intact.

[1] San Wang Dong cave lies close to another huge Wulong Karst cave named Er Wang Dong.

San Wang Dong was known to local people, although its exploration only began around a decade ago.