Hamogou is located at west bank of Fengyu valley, there is a waterfall, drop more than 100 meters. The formal name of Toad ditch is water cliff ditch, the reason why it was called toad ditch is because there is a steep mountain road, the road is very important, the only way which must be passed through climbing with four limbs like the frogs. Toad ditch is one of the most magnificent and open landscapes in Qinling Mountains. As long as you walk on the National Road, you can see its demeanor. It is like a silver ribbon, inlaid in the west mountain wall; it benefits from the moisture of sunlight, rain, dew and clouds, and it is particularly enchanting and charming. Toad ditch is shallow and risky, the grass, trees and mosses are living freely, so we should take care in Toad ditch.