Tourists ride camels on the Mingsha Sand Dunes during a visit to Crescent Moon Spring on the outskirts of Dunhuang, Gansu province June 9, 2011. Picture taken June 9, 2011.

The Mingsha Sand Dune is located 5 kilometers south of the Dunhuang city. The sand mountain is well known for its flute-like sounds in the gale, thus its name Mingsha as Loud Sand in English.