North Carolina Zoo (North Carolina): The largest natural habitat zoo in the world, covering 2,600 acres with expansive exhibits.
San Diego Zoo (California): Known for its diverse animal collection and pioneering efforts in animal care and conservation.
Columbus Zoo and Aquarium (Ohio): Spans 580 acres with a wide variety of animal species and engaging exhibits.
Smithsonian National Zoological Park (Washington, D.C.): Offers free admission and houses over 2,700 animals representing 390 species.
Omaha's Henry Doorly Zoo and Aquarium (Nebraska): Features the Desert Dome, Kingdoms of the Night, and extensive aquatic exhibits.
Bronx Zoo (New York): One of the largest metropolitan zoos, covering 265 acres with over 6,000 animals.
Denver Zoo (Colorado): Spans 80 acres with over 4,000 animals and innovative habitats promoting conservation.