Waterfalls are a unique phenomenon of nature. A waterfall is a place in a river where water spills suddenly downward. Waterfalls are known for their beauty and awesome power. Large waterfalls are called cataracts and drop straight down. Smaller or less steep waterfalls are called cascades and fall over a number of short rock walls.
Flowing river water wears away the soft rock before the hard rock. The hard rock that is left creates a steep wall. Waterfalls also form as a result of movements in Earth’s crust.
The Niagara Falls is one of the largest and the most grandiose in the world. However, Kaieteur Falls in Guyana, near the border with Venezuela, is the largest. Its height is 226 meters, which is five times higher than Niagara Falls. And there is the national park with the same name, where there are about 300 smaller waterfalls.