this is a great place, i love the layout, the docent's are helpful and willing to answer questions even if you are not on a tour. we were in Phoenix for vacation and this was a nice stop, we were there in November so the weather was nice, i can't imagine in the summer. if i lived in Phoenix i would by the yearly pass seems a better value, then you could enjoy all year, just like we do here at the world famous San Diego Zoo.