Er Wang Dong

Er Wang Dong
Location	Houping Township, Wulong County, Chongqing, China
Depth	441 m
Length	42,139 m

Er Wang Dong (Chinese: 二王洞; lit. 'Second Royal Cave') is a large cave in the Wulong Karst region, in Wulong County of Chongqing Municipality of China.[1][2]

Current known length of its passages is 42,139 metres (138,251 ft)[3][4] with a maximum depth of 441 m (1,447 ft). It is large enough to contain its own weather system. The cave starts in the 195 m (640 ft) deep Niubizi tiankeng (牛鼻子天坑; "ox nose sinkhole") and also contains the 295 m (968 ft) deep Qingkou tiankeng.

Er Wang Dong cave has formed in Lower Ordovician limestone and is located close to another very large cave system - San Wang Dong.

Both caves were explored by Hong Meigui Cave Exploration Society. Local people make weather forecasts based on the observations in Niubizi tiankeng - if there is a fog coming from the cave, rain is expected.[3]

See also

• Karst caves
• Karst formations of China
• List of caves in China

References

1. "地下化石走廊——二王洞 (The Underground Fossil Corridor - Er Wang Dong)" (in Chinese). The Official Government Website of Houping Township, Wulong County. November 5, 2009. Archived from the original on October 4, 2013. Retrieved October 2, 2013.
2. Leslie Lapides (3 Oct 2013). "First-Ever Images of Er Wang Dong Cave, A Cave With Its Own Weather System". Weather.com. Archived from the original on 2013-10-04.
3. "Er Wang Dong Cave". Wondermondo. 11 October 2013.
4. "Website of Hong Meigui Cave Exploration Society". Archived from the original on 2021-02-12. Retrieved 2013-10-03.