Introduction to the Mysterious Valley: Starting from the entrance of Huxiao Cliff, passing through Wuzhi Peak, approaching Mount Everest, and arriving at Duxian Bridge, it is more than 400 meters long and has a drop of more than 100 meters. There are three big caves in the whole valley: Dragon Palace, Labyrinth and Xiaoyao Palace; there are many strange rocks, including swords, pen holders and March birds. In the valley, there is a cave above the cave, and in the cave, there are connected paths, with steep rocks and ancient pines on both sides, and strange flowers and trees along the way. Since ancient times, it has been regarded as a blessed place by Taoists, and it is called Sixuan Dongting Cave Mansion.