Victoria Falls is classified as the largest, based on its combined width of 1,708 metres (5,604 ft)[6] and height of 108 metres (354 ft),[7] resulting in the world's largest sheet of falling water. Victoria Falls is roughly twice the height of North America's Niagara Falls and well over twice the width of its Horseshoe Falls. In height and width Victoria Falls is rivalled only by Argentina and Brazil's Iguazu Falls. Wiki

The devil's pool is a pool of water right at the edge of the waterfall where people can swim around without getting pushed over by the falling waters.