Introduction to Yanzi Cave: Yanzi Cave is located in Doubizhai, Jiacha Village, and is the underground outlet of Jiacha River. Next to the cave is a steep wall of 100 feet, with a blocking stone at the entrance. The entrance is 100 meters high, 40 meters wide, and about 800 meters deep. It looks like a lion's mouth wide open, which is eerie and scary. The cave is divided into two layers, the upper layer is a dry cave, and the lower layer is a water cave. Cave, the water cave turns left and turns into the netherworld; the dry cave can pass through to the entrance of the underground river. There are stalactites, waterfalls, falls and pools in the cave, and the scenery is beautiful. When spring comes, tens of thousands of rock swallows gather in the cave. When they leave early in the morning and return late in the evening, they chirp continuously and can be faintly heard from miles away. They enter or exit, shuttle and fly, as dense as a swarm, like flowing clouds. The sky and the earth are overwhelming, and the scenery is magnificent.