Crescent Moon Spring, also called sand spring in the ancient time, is one of the eight famous sights from the Han Dynasty. It lies at the foot of the Vocal Sand Dune and is named for its shape.

　　The spring is about 100m long and 25m wide, and has fish and water weeds that are said to be good for the health. The area is often hit by windstorm, which drives up sand to shut out sun-light. Interestingly enough, however, for hundreds of years people have never seen the spring filled up with or covered by sand. Crescent Moon Spring is honored as the No.1 Spring in the desert.