I spent two weeks in Zimbabwe back in 1997, when things were a little more stable than the country is now..
I went on safari, and saw loads of wildlife - giraffes, rhino, zebra, elephants, monkeys and hyenas - but no big cats! The highlight of this was a moonlit trip to a water hole to see the elephants taking the water - I saw over fifty elephants jostling each other.
While staying in a tourist lodge in Hwange National Park I was awoken in the middle of night by a very loud noise, I managed to make it to the window in time to see a herd of zebras stampeding through the compound. I was glad I was inside at the time!
I took a daytime safari to try and find a rhino, after an hours drive into the Park we got out of the Land Rover and started to walk. I thought the chances of find a rhino was remote, but when the guide found a foot print, and started to follow it I was a little more convinced. After about an hour, we found the rhino sitting down under a tree. Luckily we were downwind, so it couldn't smell us, and we managed to get very close (in fact a bit to close for my liking). When the rhino stood up we spotted that she had a baby rhino with her - at that point all the cameras started going!!
I also made it to Bulawayo, and stayed in a very low key B&B The Lalani Travellers Lodge - while I was in Bulawayo there was a huge Expo going on, showing all the things that Zimbabwe produces.
Another amazing sight is Great Zimbabwe (a world heritage site), an entire city built of stone, while Europe was in the dark ages. Each stone is beautifully dressed, and fits its neighbours with no gaps on any side. It's a massive site that must spread over a couple of hectares. Some of the walls must be at least five metres tall, and each has a lattice work pattern at the top.