A line of visitors tour on camels at Mingsha Mountain, or Singing Sand Mountain during the traditional Chinese dragon boat festival in Dunhuang, northwest China's Gansu Province, June 6, 2011. (Xinhua/Zhang Weixian)
A line of visitors tour over a sand dune at Mingsha Mountain, or Singing Sand Mountain during the traditional Chinese dragon boat festival in Dunhuang, northwest China's Gansu Province, June 6, 2011. (Xinhua/Zhang Weixian)
A boy enjoys himself over a sand dune at Mingsha Mountain, or Singing Sand Mountain during the traditional Chinese dragon boat festival in Dunhuang, northwest China's Gansu Province, June 6, 2011. (Xinhua/Zhang Weixian)