Introduction to Black Dragon Pool: Black Dragon Pool is located in the eastern suburbs of Fengtai City, at the foot of Black Rock Mountain on the east bank of the Huaihe River. There is a cave under the stone wall that can accommodate more than a hundred people. When the water rises, it disappears, but when the water falls, you can enter. There is a spring in the cave, named "Huai Spring". There is the ancient Zishou Temple on the pool, where Ouyang Xiu and Su Dongpo of the Song Dynasty left poems.