The Henry Doorly Zoo and Aquarium in Omaha, Nebraska, is one of the premier zoos in the world, known for its innovative exhibits, conservation work, and immersive experiences. The zoo spans 160 acres, making it one of the largest zoos in the United States. Established in 1894 as Riverview Park Zoo, it was renamed in 1963 in honor of Henry Doorly, whose widow made a significant donation for its improvement.