The ruins at Great Zimbabwe and Khami are interesting. And Victoria Falls is awesome. At Victoria Falls you can take a flat water boat trip above the falls, white-water raft below the falls or fly over the falls. Each is unique. One the negative side a severe drought in the early '90's paralyzed a lot of the economy.
Unemployment is a serious problem, with that come petty crime, especially in the cities.
Be particularly alert to scams. A frequently on involves distracting the victim with a piece of paper for collecting pledge to some kind of fund raiser. The victim is them surrounded and pick-pocketed before he can get the paper out of his face. Be city wise, travel in a group and be alert. It is like the African story of five people describing an elephant, one described the tail, one described the foot, one described the trunk, one described the ears and one described the ridge of the its back.