The Bezeklik Thousand Buddha Caves are a collection of retreats once inhabited by Buddhist monks dating from the to the centuries between the cities of Turpan and Shanshan (Loulan) to the north-east of the Taklamakan Desert of Xinjiang Province.
Mammoth Cave National Park, Kentucky, USA, encompasses part of Mammoth- Flintridge Cave System the longest cave system in the world. It is over twice as long as the second largest cave system, Mexico's Sac Actun underwater cave.
PHOTOS: China's Harbin Ice And Snow Festival 2012 Lights Up
View of colourful rock formations at the Zhangye Danxia Landform Geological Park in Gansu Province, China. The Zhangye Danxia Landform Geological Park is from Zhangye city. The park spans more than 400 square kilometers in Gansu. The unusual .