I love this zoo. I visited the zoo in the spring of 2009 while I was visiting Pittsburgh from Phoenix. The zoo is covered in lush green trees ( as is Pittsburgh), quite hilly (I got my exercise walking around), with a great collection of animal. The best part, of course, is the aquarium. The building is beautiful with wonderful exhibits for visitors to see. The best part, my membership to the Phoenix zoo got me in free to the Pittsburgh zoo! Woohoo!