The reason we went to Zambia was to visit Victoria Falls. More specifically, we wanted to swim in The Devil's Pool, a natural infinity pool at the top of the Falls on the Zambian side. The timing was right, since you can only swim in the pool during the drier months of May through October. Any other time of year, and you'd be swept up by 500 million litres of water and fall 360 feet to your death. Exciting!
To get to the pool, you have to pay for a tour of Victoria Island, which includes a stop at The Devil's Pool. You're brought to the island by boat, then walk a short distance to check out the point where it's said David Livingstone got his first look at the falls. Then, you get to the edge of the river. You strip down to your swimsuit and - without thinking about it too much - jump into the water where hippos and crocs swim leisurely. (Although that's making it sound much more daring than it is - the large crocs and hippos don't get that close to the edge, for they wouldn't survive the fall.)
After a very short swim, which is shallow enough that if you wanted to you could walk on the rocks below, you get out of the water on a smaller island and then, finally, into the pool.
Once you're in the water, you feel the current gently pushing you to the edge, which is a rock lip about 3 ft thick. It's a very surreal experience to be on top of a waterfall. The water levels were super low, so we could lay on top of the edge and look straight down. The guides kept saying, "go farther, lean more!" and other crazy things, as they ran along the edge and jumped over us. Clearly, for them, being up there is no big deal.
Admittedly, we found it to be a bit tamer and less death-defying as we had originally pictured it. That said, we're so happy that we did it and can say we swam at the edge of a massive waterfall.