Greaterville, Arizona

Kentucky Camp is a ghost town and former mining camp along the Arizona Trail in Pima County, Arizona, United States, near the community of Sonoita. The Kentucky Camp Historic District is listed on the National Register of Historic Places and has been since 1995. As it is located within Coronado National Forest, the United States Forest Service is responsible for the upkeep of the remaining buildings within the Kentucky Camp Historic District.

Cave of the Bells is located in Sawmill Canyon on the eastern slopes of the Santa Rita Mountains of Santa Cruz County, Arizona. The cave contains a lake which is 80 meters below the entrance level. The lake has been measured at 76 °F (24 °C) and is believed to be warmed by sources below. Nearby Onyx Cave is also of interest.

Onyx Cave is a solutional cave system with about 0.5 miles (0.8 km) of passages formed in Permian limestone in the Santa Rita Mountains of Arizona. It is part of the Coronado National Forest. It was designated a National Natural Landmark in 1974.

The Santa Rita Abbey is a monastic community of the Trappistine branch of Cistercian nuns located in Sonoita, Arizona, within the Diocese of Tucson.

Fort Buchanan was a US Army post founded in 1856 three miles southwest of present-day Sonoita in Santa Cruz County, Arizona, on the east slope of what is now called Hog Canyon. At the time, the area was under constant threat from hostile Apaches. Full-scale war with the local Chiricahua Apache was initiated by the Bascom affair in early 1861, during which Lieutenant George Nicholas Bascom and his patrol were based at Fort Buchanan. The post was officially abandoned in 1861, though troops of the California Column occasionally manned the post during the American Civil War. In February 1865, Apaches attacked and burned the fort in the Battle of Fort Buchanan, forcing the small garrison to retreat. It was then abandoned for good, and Fort Crittenden was established half a mile east on the flats in 1867.After having been lost for years, the ruins of the fort were rediscovered in 1929 by Harry J. Karns, mayor of Nogales, Arizona, and Arizona Superior Court Judge W. A. O'Connor.

The Battle of Fort Buchanan was an Apache attack on the United States Army post of Old Fort Buchanan in southern Arizona Territory, which occurred on February 17, 1865. Though a skirmish, it ended with a significant Apache victory when they forced the small garrison of California Volunteers to retreat to the Santa Rita Mountains. Fort Buchanan was the only American military post conquered during the war against the Chiricahua.

Fort Crittenden, originally Camp Crittenden, was a United States Army post built in 1867 three miles from Sonoita, Arizona along Sonoita Creek. It was established for campaigning against the Apache and to protect American pioneers in the area.

The Santa Rita Experimental Range and Wildlife Area is the longest continuously active rangeland research facility and among the five oldest biological field stations in the United States. Located south of Tucson in Pima County, Arizona, the 52,000 acre Santa Rita Experimental Range (SRER) was founded in 1903 and administered by the United States Forest Service until 1987, when the University of Arizona College of Agriculture took over administration of the site. The mission at the SRER is "to advance research and education on the ecology and management of desert rangelands through the secure, long-term access to research areas, state-of-the-art facilities, new discoveries, and research legacies."

Huerfano Butte (English: "Orphan Butte") is a small rocky butte located on the western flank of the Santa Rita Mountains in southeastern Pima County, Arizona. With an elevation of 3,992 ft (1,217 m), Huerfano Butte is one of the dominant landmarks in the 52,000-acre (21,000 ha) Santa Rita Experimental Range, as well as an important prehistoric archaeological site.

Sonoita (; O'odham: Ṣon ʼOidag) is a census-designated place (CDP) in Santa Cruz County, Arizona, United States. The population was 803 at the 2020 census.The origin of the name of the CDP is the O'odham Ṣon ʼOidag, which may be best translated as "spring field".

The Fred Lawrence Whipple Observatory is an American astronomical observatory owned and operated by the Smithsonian Astrophysical Observatory (SAO); it is their largest field installation outside of their main site in Cambridge, Massachusetts. It is located near Amado, Arizona on the summit, a ridge and at the foot of Mount Hopkins. Research activities include imaging and spectroscopy of extragalactic, stellar, solar system and extra-solar bodies, as well as gamma-ray and cosmic-ray astronomy.

The Infrared Optical Telescope Array (IOTA) was a stellar interferometer array. IOTA began with an agreement in 1988 among five Institutions, the Smithsonian Astrophysical Observatory, Harvard University, the University of Massachusetts Amherst, the University of Wyoming, and MIT/Lincoln Laboratory, to build a two-telescope stellar interferometer for the purpose of making fundamental astrophysical observations, and also as a prototype instrument on which they could perfect techniques which could later lead to the development of a larger, more powerful array. On site construction went on for all 1993 and 1994, with first fringes in December 1993. It is located at Fred Lawrence Whipple Observatory. In 2000 the third telescope came online providing closure phase observations, allowing aperture synthesis imaging to be performed for the first time at IOTA. The array was decommissioned and disassembled in summer 2006 due to lack of funding.