Introduction to Waterfall: "Waterfall" is particularly popular in the European Alps. It is usually done along the cliff from upstream to downstream along the main body of the waterfall, using ropes to jump down or slide down the water. Because the stones washed by the waterfall for a long time are slippery and covered with moss, and the impact of the waterfall on the descenders will affect their judgment of speed and strength, the waterfall descent is more varied and more interesting than the ordinary rock wall descent. challenge.