Rated Tucson's #1 tourist attraction by TripAdvisor, the Arizona-Sonora Desert Museum is mostly an outdoor experience on 21 acres of pristine desert, and focuses on the Sonoran Desert region of Arizona and Sonora, Mexico. The Museum includes 230 animal species in a zoo with a popular hummingbird aviary, 56,000 plants in the botanical gardens, a natural history museum, one of the most comprehensive regional mineral collections, the Warden Aquarium, the Ironwood Art Gallery, two miles of walking trails and casual dining in two restaurants. More than 85% of what you will experience here is alive.