There are a lot of upgrades going on at this zoo, so be prepared for several areas to be closed. The areas that have already been upgraded are VERY nice. It's easy to get very close to the animals in these new sections. However, it's very difficult to take pictures because of the fences and glass used at this zoo. I haven't had the same photography issue at other zoos. The worst part of the Knoxville Zoo is the reptiles because it is just so hard to see them through the glass (or plastic or whatever it is). The best part for me is a tie between the river otters and the prairie dogs. Also, the butterfly area is very beautiful. I actually had a butterfly land in my hair and my boyfriend snapped a picture before it flew away. The food and refreshments here are a bit pricey. The dippin' dots always seems to be closed when we go, but here's a tip - you can usually get them at the regular snack stands if you ask! There are a few steep hills at this zoo if you have mobility issues. But there are several benches throughout the zoo to sit on if you need to take a break.