Alishan Sister Tan is divided into two natural pools of sister pool and sister pool size. The area of sister pool is 2250.5 square meters, and the depth of the water is 2.5 meters. The most unique thing about sister pool is that the original teak tree head root has been cut down in the pool as the foundation, and the two Xiangsi Pavilion is built in it. Whether it is sunny or cloudy, there is a feeling of quiet thinking. As for the sister pool, it is slightly smaller and slightly round, the pool water is clear like a mirror, and there are wooden chairs and the walk around the pool.