One-Line-Sky is located in the south end of the Wuyi Mountain peak and in a secluded valley in the south of Erqu Creek. There is a giant rock at this place, named Fu Lingyan. Rocks tilt out and cover three adjacent caves. A closer look inside the hole, if you look at the cracks on the top of the cliff, you can see the wonders of the sky. This is what is called the "One-Line-Sky". In the straits of the One-Line-Sky,, there are rare white bats, and there are also a bamboo species called Sifang bamboo. On the right side is the Fuxi Cave, with a wind tunnel in the middle and the Lingyan Cave on the left.