Tohono Chul is a botanical garden, nature preserve, and cultural museum located in Casas Adobes, a suburb of Tucson, Arizona. The words "tohono chul" translate as "desert corner" and are borrowed from the language of the Tohono O’odham, the indigenous people of southern Arizona. The mission of Tohono Chul is to connect people with the nature, art and culture of the Sonoran Desert region and to "inspir[e] wise stewardship of the natural world".

Tucson is a city in and the county seat of Pima County, Arizona, United States, and is home to the University of Arizona. It is the second-largest city in Arizona behind Phoenix, with a population of 542,629 in the 2020 United States census, while the population of the entire Tucson metropolitan statistical area (MSA) is 1,043,433. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area. Both Tucson and Phoenix anchor the Arizona Sun Corridor. The city is 108 miles (174 km) southeast of Phoenix and 60 mi (100 km) north of the United States–Mexico border.