Two ethnic Miao children play basketball at a school playground inside a huge cave at a remote Miao village in Ziyun county, southwest China's Guizhou province February 12, 2007. The village of Zhongdong, which literally means "middle cave", is built in a huge, aircraft hangar-sized natural cave, carved out of a mountain over thousands of years by wind, water and seismic shifts. REUTERS/Jason Lee (CHINA) Also see image: GF1DURNZDEAA