Introduction to the natural rift valley: The natural rift valley is more than 30 meters deep and about 2 meters wide. The narrowest point is less than one meter wide. The rift surface is as smooth as an ax and a knife. The vertical cage ladder down to the valley is thrilling. Older tourists can go down to the valley from the gentle plank road next to it. The valley is deep and secluded, and there are often rare gems hidden deep in it.