1. Tiankeng Group in Houping Township, Wulong, Chongqing The only Tiankeng Group in the world formed by surface water erosion is located in Houping, Wulong. The total area of the scenic spot is 38 square kilometers. The main attractions are Qingkou Tiankeng, Niubi Dongtiankeng, Shiwangdong Tiankeng, Dalongdang Tiankeng, Tianping Temple Tiankeng, Erwang Cave, Wangsandong, Mawan Cave, Baota Shilin and Wenfeng Mountain Soviet Government Monument. On June 27, 2007, Houping Tiankeng Group was listed in the World Natural Heritage List, which is a classic of karst geology and geomorphology in southern China.
2. Fengjie Tiankeng is located in Xiaozhai Village, Zhu Jing Township, fengjie county, Chongqing, 9 1 km away from Fengjie County. Tiankeng is a common name of karst funnel, an important example of the Quaternary evolution history of the earth, a "living fossil" of the origin of the Three Gorges of the Yangtze River, and one of the wonders of caves in the world today. Xiaozhai sinkhole is the largest sinkhole in the world. Xiaozhai Tiankeng was selected as the first batch of "China National Natural Heritage and National Natural Cultural Heritage Preparation List" by the Ministry of Construction.