Jingyuetan is surrounded by mountains on three sides, with a man-made reservoir dam on one side. The reservoir dam is like a rolling dragon vein, lying on the side of Jingyuetan Lake, spanning between Guantan Mountain and Xishan Mountain. The dam is 555 meters long and 19 meters high. On the east side of the dam is a boat pier for tourists to go boating, play in the water, watch the mountains change. From there, you can see the forest, the water, the grass, and the rocky mountains, it is really a lot of fun.

Next to the dam, there is a small round building built in the same period, it is one of the earliest buildings in the scenic area, called " Fangshui Tower", in which there was a valve to control the water supply for the city of Changchun. Nowadays, the mechanical equipment inside the tower has not changed much, and it can still be used, and it has become the iconic landscape of Jingyuetan.