The Fairy Cave, Water curtain Cave, ice Cave and underground glacier are all volcanic lava caves. As we all know, when a large amount of magma overflows from a volcanic eruption and flows to a low place, if a rock flow is thick and flows stagnant, its surface will solidify first, and the center of this lava flow is still in a molten state, which can be under the action of gravity. And it will continue to flow forward in the hard crust under the push of the subsequent rock flow, thus forming an underground tubular channel with a hard crust on the outside and the lava flow in the center to continue to flow forward—a lava flow tunnel. When the lava flows out from the rupture at the front of the tunnel and there is no supplement, the tunnel through which the lava flows becomes a cavity and becomes an underground cave, and the walls of the cave are covered with spiny stalactites. If a local collapse is formed at the thinner part of the cave roof, the cave will be exposed and the cave mouth will be connected to the surface. The fairy palace was formed by the eruption of the Laohei Volcano volcano, and the time is new. The two caves, the ice cave and the underground glacier, are on the lava platform of the East Jiaodebushan. They are formed in an old age. The lava samples taken from the underground glacier cave were tested by the K-Ar method, and the lava formation time was 512,000 years.