At its height during the wet season, Victoria Falls or Mosi-oa-Tunya (the Smoke that Thunders) is one of the largest sheet of falling water in the world. The falls, situated between Zambia and Zimbabwe decrease in size during the drier months of September to December. At this time a pool is formed near the edge of the waterfall with a rock wall that keeps swimmers from being sucked over the 108 metre fall.
The image is from http://upload.wikimedia.org/wikipedia/commons/1/12/Tourists_swimming_at_Victoria_Falls.jpg
