Introduction to Taoyuan Cave: Taoyuan Cave is a large cave 350 meters long, 50 meters wide and 20 meters high. The cave is so dark that you can barely see your fingers. A clear stream flows through the cave, and the rocks are in various shapes and shapes, full of dark and magical colors. On the cliff at the entrance of Taoyuan Cave, there are the words "Trace the river to find the source".