Livingstone - go for swim in the Devil's Pool
For a major adrenaline rush take a trip to Livingstone Island, at the top of Victoria Falls. Follow this by going for a swim in the Devil’s Pool, and try peering over the edge of the falls, but be careful. This is only possible during the dry season, when the force of the water slackens, and will not sweep you over the falls. Only 60 people a day can take this unique opportunity, and you must be a reasonably good, strong swimmer. Although there are guide ropes to assist you, this is definitely not for the faint hearted.