泸沽湖
Lugu Lake () is located in the northwest of the Yunnan plateau, with the middle of the lake forming the border between the Ninglang County of Yunnan Province and the Yanyuan County of Sichuan Province. The formation of the lake is thought to have occurred in a geological fault belonging to the geological age of the Late Cenozoic. It is an alpine lake at an elevation of and is the highest lake in the Yunnan Province. The lake is surrounded by mountains and has five islands, four peninsulas, fourteen bays and seventeen beaches.