“Yadan,” which refers to a precipitous hillock in the Uygur language, is a kind of wind-eroded landform. Yadan landforms rise above the flat Gobi Desert and cover a vast area. Due to its eccentric landforms, the hard-to-spot roads, low-lying terrain, strong magnetism and howling sounds made by the wind, the area is also called "Ghost City" by local people.
Dunhuang Yadan National Geologic Park is located on the northwest of Dunhuang, 180 kilometers away from the city. Yadan Landforms is the largest in scale, fully developed in geology and most valuable for ornament in the world. It is 25 kilometers long from east to west and 18 kilometers wide from south to north. The scenery area can be divided into two parts. The scenery sites have an infinite variety of fantastic phenomena and the superlative craftsmanship of nature. Many world famous architects can find their miniatures here.
Yadan landform, or Dunhuang Ghost City, is 85 km from the West Yumen Pass, extending 25 km from east to west and 1-2 km from north to south. 
Yadan extends far beyond what is written in textbooks and is a rarity around the world in terms of the scale and configuration.
Dunhuang Yadan National Geologic Park is a physiognomy landscape formed by Aeolian erosion. It is composed of various sculptures, and one may find numerous well known architectures here. Because of the eeriness of the sound of the wind blowing at night, the locals refer to it as Ghost Town. While traveling on this line, tourists should prepare enough food and water and bring along a hat and sunglasses. Cameras should also be protected from the strong sandstorms.