Desert Botanical Garden, Phoenix, Ariz.

Desert Botanical Garden in Papago Park is not only a botanical garden, but it is also classified as a museum.

Desert Botanical Garden covers about 50 acres, and in addition to the the vast array of native plants on display, the garden is home to over 21,000 plants representing 3,931 plant classifications in 139 plant families. Nationally and internationally renowned for its plant collections, research, and educational programs, Desert Botanical Garden has been operating since 1939.