San Diego Zoo (California): Famous for its extensive animal collection and pioneering zoo design.
Bronx Zoo (New York): One of the largest metropolitan zoos in the world, known for its diverse species.
Smithsonian National Zoological Park (Washington, D.C.): Part of the Smithsonian Institution, free to the public.
Omaha's Henry Doorly Zoo and Aquarium (Nebraska): Features an impressive array of exhibits, including a desert dome and indoor rainforest.
Los Angeles Zoo and Botanical Gardens (California): Features a wide variety of species and beautiful botanical gardens.
Riverbanks Zoo and Garden (South Carolina): Known for its beautiful botanical gardens and diverse animal collection.
Brookfield Zoo (Illinois): Located in the Chicago suburbs, known for its diverse exhibits and large size.