www.boston.com/bigpicture/2010/09/scenes_from_c...
очень, очень качественная подборка.
фото для привлечения внимания:

Tourists climb the Singing Sand Dunes near the Crescent Moon Spring on July 20, 2010 in Jiuquan of Gansu Province China. The Crescent Moon Spring, named after its unique moon-like shape, is located at the north foot of the Singing Sand Dunes, about 50 meters (164 feet) from north to south and 5 meters (16 feet) deep on an average. (Feng Li/Getty Images)