This 100-acre zoo, home to more than 4,000 animals, is one of the largest in the world and a renowned center for education and conservation. Its size means you need to go in a route plan if you're not going to miss anything. Highlights for many include the gorillas, tigers and California condors; this is also one of the few zoos outside China where you can see giant pandas. Particular emphasis is placed on replicating natural outdoor habitats and the zoo manages an outstanding collection of rare plants.
If you go:
If you want an overview of the zoo before you start exploring, take the overhead gondola Skyfari.
Links:

2920 Zoo Drive
San Diego, California 92101 USA
Phone Numbers:
+1 (619) 231-1515
Toll-free
+1 (800) 407-9534
+1 (800) 407-9534