The eighteenę½of Western Beijing is one of the rare natural scenic spots in northern China. The brook in the valley flows all the year round. The ancients said: "Ten thousand overlapping Yanshan mountains and ten thousand springs, flowing for thousands of miles and hanging over the long river", The eighteenę½is located in Anjiazhuang, Wangping area, Mentougou, and is famous for its deep valley, strange stones, special water and exotic flowers.