Li Bai has a poem: "On the fish and the Bitan, the wood falls on the Tan Shuiqing", the number of the mountains, the picture of the mountains and the beautiful water will be in front of you, and the fine goods come, I feel that these two poems are tailor-made for Beijing Black Dragon Pool. . Black Dragon Pool is located in Shicheng Township, Miyun County, Beijing. It is surrounded by a 4km long river in the north of Lupiguan, with a water level drop of 220 meters. The reason why Black Dragon Pool is famous is that it is unique in its new, strange and dangerous. There is no repeating landscape in the entire valley shoal. It is wonderful in nature's wonders, and it is dangerous and thrilling in the waterfall Longtan. The black mountain is steep and the trees are dense. The green hills on the two sides stand opposite each other. A winding wooden plank road traverses the mountainside. During the walk, the scenery under the feet is like a floating gauze. The breeze is over. All sorrow can be left behind. Black Dragon Pool is full of water-eroded landforms. Many rock walls are cut like a knife. The waterfall of more than 50 meters high descends from the sky, the haze rises, the valley is filled, and the air is blowing. Black Dragon Pool can escape the summer in summer, red leaves in autumn, and winter is a good place to watch the wonders of the ice waterfall.