The Arizona-Sonora Desert Museum is a 98-acre (40 ha) museum and zoo founded in 1952 and located in Tucson, Arizona. It contains a museum and two miles (3.2 km) of walking paths on 21 acres (8.5 ha) of this property, and is one of the most visited attractions in Tucson. The facility combines the attractions of a zoo, museum, and botanical garden, with a focus is the plants and animals that live in the Sonoran Desert, and it was a pioneer in the creation of naturalistic enclosures for its animals. The museum is an accredited member of the Association of Zoos and Aquariums (AZA), and attracts over 500,000 visitors each year.