There are two seasons for Victoria Falls, wet and dry. During the wet season the falls are at their full might and dumping millions of gallons of water by the minute. While the water is at full blast, viewability is low due to the mist coming off the water. The dry season has a much better view with only small portions blocked by mist, however during this period there are large areas of the falls with little to no water running down. Both have their advantages and disadvantages, however the falls are epic enough that you'll have a good time either way. Just make sure to bring a change of clothes if you come on the wet season. As an added note, there are monkeys on the trail at certain portions, and they can at times be aggressive. Make sure that you don't feed them, and keep hold of your belongings.
The area around Victoria Falls is also a haven for thrill seekers with bungee jumping, giant swings, and some of the worlds most difficult white water rafting. If you're looking for something a little calmer, a visit to the border bridge between Zimbabwe and Zambia is a fun adventure. You will need to go to the boarder offices and show your passport, however just tell them that you want to walk the bridge and they don't require that you buy a visa. You will also be inundated with people trying to sell you local art and old currency, they'll talk to you for a while, and then go for the hard sell. You can say no, and make sure to remind them before you start the conversation that you have no interest in buying anything. The center of the bridge is the real highlight, at this point you can watch the daring folks that want to bungee jump, and you can stand in the small marked area in the middle known as Zim-Zam. The town of Livingston near the falls offers a few restaurants and tourist shops, but not much else.
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