It is quite a large zoo and three hours really isn't enough time to see it all, however you can see a fair amount in that time. We are members so we tend to pop in for a few hours, see a bit of the zoo at a time. Bat cave is cool and the Jaguar enclosure is good too. Butterfly house for the kids. Oh Chester is doing Rhinomania at the moment so there are a couple of painted model rhinos at the entrance and one on the roundabout. If you are local to chester it is good for the kids as you can do a sort of "gotta catch them all" thing over the summer.