Introduction to Yixiantian: Going west through Tongtian Cave is Yixiantian. When you raise your head, you can see a ray of sky in the rock gap. Because of its name, there is a cold spring in front of Yixiantian. After passing the cold spring, halfway up the mountain to the north peak is the Taoguang Golden Lotus Pond, which is the fourth most famous spring in Hangzhou.