Crescent Lake, also known as Yueya Spring, is a crescent-shaped lake surrounded by desert, 6 kilometers south of the city of Dunhuang, northwest China's Gansu Province. Just as water and fire are incompatible, it is rare to see the coexistence of a desert and a spring. However, this is not the case for Crescent Lake that is surrounded by Echoing-Sand Mountain. The golden sandhill and the blue lake cast a beautiful contrast in harmonious existence.