Introduction to Sanxian Cave: Sanxian Cave is a natural stone cave on the cliff. Because the three naturally occurring stones in the cave resemble foxes, monkeys, and Chang'e, they are called the incarnations of the "Three Immortals" among the people, so it is named Sanxian Cave. Sanxian Cave was formed in the late Permian era, 2.65 million years ago. The cave is divided into upper and lower floors, with 16 halls and more than 120 scenic spots. The largest hall is more than 50 meters wide and 30 meters high. It is located in Mengga Town, 41 kilometers southeast of Mangshi.