Chiny - Houping Erosional Tiankeng - Wulong Karst ( 武隆喀斯特 ) ....

CHINY - Houping Erosional Tiankeng  - Wulong Karst (  武隆喀斯特 )

https://www.travelchinaguide.com/attraction/chongqing/wulong-karst/
http://www.wondermondo.com/Countries/As/China/Chongqing/Xiaozhai.htm
http://www.wondermondo.com/China/Chongqing/Xiaozhai.htm
http://www.chinadaily.com.cn/travel/
https://www.youtube.com/watch?v=PXRSaaXXfdc

Coordinates :  30°45′02″N 109°28′12″E