Located in the north of East Wawu mountain, it is 4 kilometers away from Jinhua bridge to the southwest, with a total length of 2 kilometers and an altitude of about 1376 meters. It is an important epitome of the “water world” of Wawu mountain. It is formed by the streams of Dafa cave and Sanxing cave in the middle of the mountain, with beautiful forests and valleys and gurgling springs. The three characters “shuangdongxi” on the image stone are written by Su Shi, a great writer.