It is a cluster of several karst landscapes, consisting of gorges, natural bridges, caves, eroded dolines, shafts and underground streams. Wulong Karst is a valuable treasure that nature created. Wulong Karst features spectacular karst landscapes, including the three main parts of Furong Cave, Three Natural Bridges, Houping Giant Doline (Houping Tiankeng) and other scenic spots. It was named as a world natural heritage by UNESCO in 2007. Wulong Karst National Geology Park, an important part of South China Karst, is situated at the lower reaches of the Wujiang River in southeast Chongqing.