Introduction to Guigu Cave: Guigu Cave hangs on a 100-foot cliff in the Xianxian Wonderland Scenic Area on the west line of Tianmen Mountain. Due to the dangerous terrain, it is not open to the public for the time being. The entrance of the cave looks like an inverted trapezoid from a distance. There is a tree at the entrance of the cave, which is a rare national first-class protected plant.