Introduction to the Mysterious Valley: It is located on the north side of Ningyue Tower, adjacent to Baiguoyuan. It is located in the low-lying area connected by the two ridges of Shenying Mountain and extends inward to the hinterland of Shenying Mountain. The total length is about 200m, the width is less than 20m, and it is long and narrow. The average depth in the valley is about 5m. It is mostly wild trees, flowers and plants. The whole valley is quiet, deep and relatively hidden.