San Diego Zoo

The absolutely immense San Diego Zoo is home to more than 3,700 animals from across 650 species and subspecies. Exhibits are grouped by habitat, including the African rainforest, the monkey trails, and an aviary.

A guided tour bus traverses the park and an overhead gondola lift transports you from one end of the zoo to the next. The zoo is housed in the even larger Balboa Park, a large, urban green space with gardens, 15 museums, a replica of Shakespeare's theatre, a carousel, and a miniature railroad.