Cataracts are steep rapids and waterfalls that occur along the courses of rivers in Africa. They are often found where rivers descend from higher elevations to lower ones. Cataracts can impede transportation on rivers by making them difficult or impossible to navigate. Some of the most famous cataracts in Africa include the Victoria Falls on the Zambezi River, the Murchison Falls on the Nile River, and the Augrabies Falls on the Orange River.
