Qinghai Nanbaxian Yadan Devil City is located in Lenghu Town, Lenghu Administrative District, Haixi Mongolian and Tibetan Autonomous Prefecture, Qinghai Province. Nanbaxian Yadan because of its strange and grotesque landform, erratic wind, due to the strange terrain and the strange wind generated by the wind of the secret serpent, coupled with the local rock rich in iron, geomagnetic powerful, often make the compass fail, resulting in the inability to distinguish the direction and lost, is regarded by the world as the devil city, ecstasy, Unique. The total area of Yadanlin here is about 2.1 10,000 square kilometers, with an average altitude of 3,260 meters, which is the most extensive wind erosion soil forest group found in China so far.