Mianshan Mountain has more than 100 natural rock caves in total. The largest one is Baofu (Belly-Embracing) Rock. Located in the central part of Mianshan Mountain, Baofu Rock faces west. It is known as the most famous scenic spot in Mianshan Mountain. The upper part of the rock is projecting; the lower part is sunken; and the central part is empty. It looks like a belly held in the arms in a distance. This huge rock cave is about 60 m high, 50 m deep and 180 m long, and can hold over 200 halls and rooms and more than 10,000 tourists. Known as the No. 1 Rock Cave on Earth, it reflects the historical civilization over the past 2,000 years.