The Phoenix Zoo
The Phoenix Zoo, opened in 1962, is the largest non-profit zoo in the United States. Located in Phoenix, Arizona, the zoo operates on 125 acres of land in the Papago Park area of Phoenix.
The zoo has approximately 1,200 animals on display, 2.5 miles (4.0 km) of walking trails, and other attractions. It was founded by Robert Maytag, a member of the famous Maytag family.
The Phoenix Zoo began as a personal project of Maytag's, who formed the Arizona Zoological Society with the intention of opening a zoo in Phoenix. Although Maytag died a few months before the opening, the zoo opened on schedule in November of 1962. It was originally named the "Maytag Zoo", but was renamed the following year to its current name to give it a heightened sense of community. The zoo has been a privately owned, non-profit venture since it opened. (Source: Wikipedia)