I visited San Diego last year and ofcourse planned a trip to the "World Famous" zoo. I'm glad I did. We started at 8am and did not finish until 530pm. I dont know if we even saw everything. We didn't take any organized tours, we just walked the park ourselves. We had a great lunch at the restaurant. It reminded me of a tree house. One of my favorite exhibits was the koala bear exhibit. They are so cute and very lazy. The whole exhibit is a deck and its eye level with the tree tops so you can see them. Alot of the exhibits made me feel like I was alot closer to the animals than I actually was. The bird exhibit was great too. I dont want to give away all the details. The San Diego Zoo is a must see!