The Tengger Desert is located in the southwestern Alxa Left Banner at the central part of the border with Gansu Province. In Mongolian, "Tengger" means "infinite sky." Within the desert, there are many lakes whose original ecological condition has been preserved. Among these lakes, the two most famous are Tiane (Swan) Lake and Yueliang (Moon) Lake. The shape of Yueliang Lake is said to resemble the outline of China. It is one of the lakes of the Tengger Desert that has kept its original coastline. Tiane Lake is surrounded on all sides by the shifting sands of the vast desert. The scenery is nothing short of spectacular. Swan Lake and its sister—Moon Lake—each has her own unique charm yet they also complement each other.