Coronado Cave

The Coronado National Memorial commemorates the first organized expedition into the Southwest by conquistador Francisco Vásquez de Coronado in 1540. The memorial is located in a natural setting on the Mexico–United States border on the southeast flank of the Huachuca Mountains south of Sierra Vista, Arizona and is bordered to the north and west by Coronado National Forest. Within the memorial is an overlook at Montezuma Pass where the Coronado expedition entered modern Arizona. The memorial confirms the ties that bind the United States and Mexico.

Miller Peak, at 9,470 feet (2,886 m), is the second-highest mountain in Cochise County, Arizona (after Chiricahua Peak). Located approximately 10 miles south of Sierra Vista, Arizona, it is the highest mountain in the Huachuca mountain range and a popular local hiking destination. The Miller Peak Wilderness encompasses 20,190 acres and is managed by the Coronado National Forest. This is also the most southerly peak and land area to rise above 9,000 feet in the continental United States. The area was affected by the 2011 Monument fire and most of the pine trees seen in older photographs were burned and destroyed. Scrub oak are beginning to replace the areas that were previously covered by pine. Google “Satellite” images from 2018 would seem to show that many of the pre-fire pine and fir trees are still there and very much alive. Furthermore, the satellite images also tend to suggest that in the few locations where 100% tree kill took place, the forest is already beginning to regenerate.

Kinjockity Ranch, also known as Lanteen Ranch, is a Pueblo Revival style residence in Cochise County, Arizona, originally built in 1939-1940 for Rufus Riddlesbarger, a wealthy Chicago businessman. It is a notable example of Pueblo Revival style, executed in adobe with richly detailed interiors and hand-made hardware. The house was designed by Edward C. Morgan, an architect from Phoenix who specialized in what he called "the Mexican style." The interiors were decorated and embellished by illustrator and sculptor Raymond Phillips Sanderson, who had collaborated with Morgan on previous commissions.

The Huachuca Mountains are part of the Sierra Vista Ranger District of the Coronado National Forest in Cochise County in southeastern Arizona, approximately 70 miles (110 km) south-southeast of Tucson and southwest of the city of Sierra Vista. Included in this area is the highest peak in the Huachucas, Miller Peak, and the region of the Huachucas known as Canelo Hills in eastern Santa Cruz County. The mountains range in elevation from 3,934 feet (1,199 m) at the base to 9,466 feet (2,885 m) at the top of Miller Peak. The second highest peak in this range is Carr Peak, elevation 9,200 feet (2,804 m). The Huachuca Mountain area is managed principally by the United States Forest Service (Coronado National Forest) (41%) and the U.S. Army (Fort Huachuca) (20%), with much of the rest being private land (32%). Sierra Vista is the main population center (43,888 inhabitants as of the 2010 Census). The Huachuca Mountains were named by the Spanish for a Pima village that once existed to the north of the range near the present location of Elgin, Arizona. Coronado National Memorial is in the southeastern margin of the range near the Mexico–United States border and includes Montezuma Pass, a possible entry point of Francisco Vázquez de Coronado into what is now Arizona in 1540. The range extends a short distance south of the border in Sonora, Mexico.

Carr Peak is the third-highest mountain in Cochise County, Arizona (after Chiricahua Peak and Miller Peak) and is the second-highest mountain in the Huachuca Mountains. It rises about 10 miles (16 km) south of Sierra Vista, Arizona. The summit is in the Miller Peak Wilderness on the Coronado National Forest and about 4 miles (6 km) south of the Nature Conservancy's Ramsey Canyon Preserve. The area is well known among birders because of the variety of hummingbird species (as many as 15) seen in the area as well as the dozens of southwestern specialties such as Apache pine, Chihuahua pine, ridge-nosed rattlesnake, lesser long-nosed bat and elegant trogon.

Nicksville is a populated place in Cochise County, Arizona, just north of the international border between the United States and Mexico. It has an estimated elevation of 4,816 feet (1,468 m) above sea level.

Hereford Arizona Observatory (HAO), IAU-code G95, is an astronomical observatory, owned and operated by amateur astronomer Bruce L. Gary. Observational studies of unusual starlight fluctuations in Tabby's Star (KIC 8462852) and WD 1145+017 are recent interests. HAO consists of two telescopes, in two separate observatory installations: HAO#1 (contains a Celestron CPC 1100, 11-inch Schmidt-Cassegrain telescope on an equatorial mount) and HAO#2 (contains an Astro-Tech Ritchey–Chrétien, 16-inch telescope on an equatorial mount).The observatory is located in Arizona about 130 km (80 mi) southeast of Tucson and about 11 km (7 mi) north of the Mexican border. Coordinates are at the following: North Latitude +31:27:08 and West Longitude 110:14:16, at an altitude of 1,423 m (4,670 ft).

Sierra Summit Academy was a charter school in Hereford, Arizona, near the larger town of Sierra Vista. The school opened in 2001 and closed in August 2011 due to losing its lease.

The Junk Bond Observatory (JBO; code: 701) is located in the Sonoran Desert at Sierra Vista, Arizona, United States. It was established by amateur astronomer David Healy in his backyard in 1996, using a Celestron 14 SCT and a 16-inch Meade LX200 telescopes in a roll-off shelter. In 2000, a 20" Ritchey-Chretien was installed, to be replaced by a 32" Ritchey in 2004. Asteroid searches began in 1998 using a local computer network and search software. The first discovery at the observatory was made by Jeff Medkeff in June 1999. It was named 38203 Sanner after Glen Sanner also a member of the Huachuca Astronomy Club.As of November 2016, a total of 272 numbered minor planets have been discovered at the observatory, using a 32-inch telescope. The Minor Planet Center credits 219 of these discoveries to David Healy and/or Jeff Medkeff. The discovery of the remaining 53 numbered minor planets is credited directly to the observatory (see list below).Until his death in 2011, David Healy was a frequent contributor of follow-up observations to objects on the Minor Planet Center's Near-Earth Object Confirmation Page, surveyed for asteroids netting approximately four new discoveries per month as of January 2007, performed discovery and confirmation photometry of extrasolar planet transits, and performed photometry of cataclysmic variable stars and active galactic nuclei. The telescope operated robotically, unattended for most of the night, controlled by software by Bob Denny and Jeff Medkeff. JBO was dismantled in August 2021. The telescope, dome, and other equipment were purchased by a private buyer.

Hereford Army Airfield is an abandoned military airfield located about 2 miles (1.7 nmi; 3.2 km) west-southwest of Hereford, Arizona, United States.

Sierra Vista Southeast, often referred to as Hereford or Nicksville, is a census-designated place (CDP) in Cochise County, Arizona, United States. The population was 14,797 at the 2010 census. It includes the neighborhoods Ramsey Canyon, and Sierra Vista Estates within its boundaries.

Palominas is a census-designated place located along the San Pedro River in the southern portion of Cochise County in the state of Arizona, United States. Palominas is located very close to the community of Miracle Valley along Arizona State Highway 92. The population of Palominas as of the 2020 U.S. Census was 222.