Linwu Cave, located on Suzhou's Xishan Island in the middle of Taihu Lake, is known as "the ninth cave under the heaven". It is an ancient cave system that has flat ground and many standing stones, indicating the unique land formation corroded by limestone. This cave had been a very important place for the ceremony of the Taoism since Han Dynasty. Now it becomes a famous attraction in Suzhou, Jiangsu Province. [Photo by Xu Lin / China.org.cn]