Yeah, its an amazing place. I went to Zambia last year, and doing the same this year too. Hopefully go down to Vic Falls in Livingstone again for a few days. Absolutely stunning place. Although the white water rafting was an experience I'm not sure I'd do again in a hurry.. It was pretty awesome tho!
The photo of the rainbow at the top is at Vic Falls. I took it standing next to a very small bridge over a bit of the canyon. The rainbow in the photo was actually a full 360 degrees.. It went under the bridge and joined up with itself.. Absolutely one of the most stunning things I've ever seen!