Photo taken on June. 6, 2010 shows the Dadi Tulou, earth buildings in Chinese, in Hua'an County, southeast China's Fujian Province. Built on a base of stone, the thick walls of Tulou were packed with dirt and fortified with wood or bamboo internally. The architectural arts of the Fujian Tulou can be traced back nearly 1,000 years, and their design incorporates the tradition of fengshui (favorable siting within the environment). (Photo: china.org.cn)