The river Zambesi sudddenly disappears from the plain, into a series of gorges, which were themselves the falls thousands of years ago. For visitors to the area, a good three or four (or more) days are needed to take in the whole area. Go White Water Rafting (picture soon!), or just enjoy the atmosphere. Eat well at Explorers, or one of the many other good-value restaurants around. Above all, take a walk over the bridge, and into Zambia. Bargain hard for your souvenirs, but don't miss out.