Do you know how much water has enormous power? Even if the water is liquid but it can destroy some stone which has flowing for a period of time. If it is waterfall then has power morn than water. It may take time to erode the land is less than it. Such as the horseshoe area of Niagara falls. The water of Niagara Falls has a curved stone corrosive until its footprints deep into stone around 1.5 km. in less than 300 years. And the energy of the water makes the waterfall shrink every year. (because the power of water is eroding stone )
Moreover, water also contributes to the valley and gorge as well. The river is used for several thousand years to create beautiful landscapes.
However, enormous power of water not only erodes something. Water is very useful. When the water from the waterfall spinning turbines. We can convert enormous energy from the waterfall into electric power. Which, the turbines will cause a electricity generator beside waterfalls work.