This was not my first visit and I hope it is not my last. Got there early with a simple bus trip from our hotel and a short walk to the gate. I took the 30 minute guided tour and learned what had changed from my last visit and had a nice overview of the complex (but unfortunately had a guide who talked as much about herself and her opinions as she did the zoo and its operations). I really enjoyed the walks through various aviaries and took the opportunity to savor the wonderful display of plants in addition to the animal collection. Even saw hippos cavorting in the water!
This is a must destination for all tourists to San Diego
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