An internationally recognised biosphere reserve on the Mexican border protecting the only place in the United States where organ pipe cactus grows wild in significant numbers. It recorded 182,612 recreation visits in 2024.
This place scores 53.4 out of 100, at high confidence. The score combines its published visitor count with public interest and tourism significance. The weighting is explained in full on the methodology page.
The Sonoran Desert (Spanish: Desierto de Sonora) is a hot desert and ecoregion in North America that covers parts of the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the Southwestern United States (in Arizona and California). It has an area of 260,000 square kilometers (100,000 sq mi). In phytogeography, the Sonoran Desert is within the Sonoran floristic province of the Madrean region of southwestern North America, part of the Holarctic realm of the northern Western Hemisphere.
The New Cornelia mine is a currently inactive open-pit copper mine in Pima County, Arizona, United States. It was the only productive mine in the Ajo mining district, and is located just outside the town of Ajo, which was built as a company town to serve the New Cornelia mines. The roughly circular pit is one and a half miles across at its widest point, and 1,100 feet deep at the center.
El Camino del Diablo (Spanish, meaning "The Devil's Path"), also known as El Camino del Muerto, Sonora Trail, Sonoyta-Yuma Trail, Yuma-Caborca Trail, and Old Yuma Trail, is a historic 250-mile (400 km) road that passes through some of the most remote and inhospitable terrain of the Sonoran Desert in Pima County and Yuma County, Arizona. The name refers to the harsh, unforgiving conditions on the trail. In use for thousands of years, El Camino del Diablo began as a series of footpaths used by desert-dwelling Native Americans.
Ventana Cave (O'odham: Nakaijegel) is an archaeological site in southern Arizona. It is located on the Tohono O'odham Nation. The cave was excavated under the direction of Emil Haury by teams led by Julian Hayden in 1942, and in 1941 by a team led by Wilfrid C Bailey, one of Emil Haury's graduate students.
Cabeza Prieta National Wildlife Refuge (CPNWR) is located in southwestern Arizona in the United States, along 56 miles (90 km) of the Mexico–United States border. It is bordered to the north and to the west by the Barry M. Goldwater Air Force Range, to the south by Mexico's El Pinacate y Gran Desierto de Altar Biosphere Reserve, to the northeast by the town of Ajo, and to the southeast by Organ Pipe Cactus National Monument.
The Nicholas U. Mayall Telescope, also known as the Mayall 4-meter Telescope, is a four-meter (158 inches) reflector telescope located at the Kitt Peak National Observatory in Arizona and named after Nicholas U. Mayall.
