San Diego Zoo
That place is so huge!!! I've been to Brookfield, Milwaukee, Texas, Florida, Denver (which is a newer, modern type zoo), all the midwest zoos and many, many others but San Diego is still the largest. Last December the white tiger from San Francisco Zoo escaped and killed and attacked some japanese guys who were teasing it. And I was in San Francisco at the time and couldn't go because they closed the zoo.
Wild Animal Park near Escondido
Yes, that is awesome. They also have a baloon ride and you can see the whole zoo. I liked the baby giraffe the most. South Dakota has a drive thru Wild Bear park I went to again this year, with bears walking all over the street in front of your car, the way it used to be in Yellowstone Park years ago, untill there were too many bear attacts because people were feeding the bears and the bears would also go through their garbage. Now the bears are being tranquilized and flewn over to territories far from campsites.
When I had a chance to visit the Warsaw Zoo a few years ago, it was closed for renovation. That's too bad they had to close the whole zoo and lose money, they could have parts of exhibits open.
I liked the London Zoo, they had a Minah Bird who would be talking to people and just a nice, pleasant zoo.
I'm a Zoo-a-holic :)