Northwest Field

The Guam National Wildlife Refuge is composed of three units: the Andersen Air Force Base Overlay Unit (Air Force Overlay Unit), the Navy Overlay Unit, and the Ritidian Unit. The Ritidian Unit, known to the native CHamoru people as Puntan Litekyan, is located on the northern tip of Guam and encompasses approximately 1,217 acres, including 385 terrestrial acres and 832 acres of submerged areas offshore.

The Cruz Water Catchment, also known historically as Finona's Water Catchment, is a historic private water supply structure in the United States territory of Guam. It is located south of Guam Highway 9 in the village of Potts Junction in the central northern part of the island. It is a circular concrete structure 3.74 metres (12.3 ft) in diameter, and is 2.55 metres (8.4 ft) in height, of which 0.87 metres (2.9 ft) is exposed above ground level. Its estimated capacity is just over 17,000 litres (4,500 US gal). It was built, according to local oral history, about 1920, and was used to capture rainfall from a nearby house that was destroyed by Typhoon Karen in 1962. The catchment was used to provide water to as many as seven local households, making possible year-round living in an area otherwise lacking fresh water. The structure was listed on the National Register of Historic Places in 1994.

Toves House, on Marine Dr. in the Anigua district of Hagåtña, Guam, was built in 1950, built mostly with ifil hardwood. It was a work of Pedro T. Toves in Pacific Spanish-Colonial vernacular architecture. It was listed on the National Register of Historic Places in 1985. It was deemed significant for its architecture, as providing continuity to past usage of Pacific Spanish colonial design. Design-wise, it picked up where World War II's devastation of Guam had stopped evolution of the style. Unfortunately, is one of few surviving post-war examples, due to loss of the native ifil forests in World War II and other factors. Other post-war structures built of softwood have been destroyed by typhoons and termites.

The Torre Water Catchment, also known as the Hatsuho Water Catchment, is located on what is now Hatsuho Golf Course in Yigo (Piga), Guam. It is a historic site that was listed on the U.S. National Register of Historic Places in 1994. The catchment has an octagonal-shaped exterior made of concrete around limestone gravel and cobbles and has a plastered cylindrical interior. It is 5.19 metres (17.0 ft) in diameter and its walls vary from .27 to .46 meters thick. It was built in approximately 1916 by a farmer, Juan dela Torre, to provide water when needed, in a northern area of Guam that is far from regular water supplies.

Naval Computer and Telecommunications Station Guam (NCTS Guam) is a United States Navy communications facility on the U.S. territory of Guam. It is located on the Naval Base Guam North Finegayan Telecommunications Site along Guam Highway 3 in Dededo, on the northwest coast of the island. NCTS Guam is under the United States Tenth Fleet's Naval Computer and Telecommunications Area Master Station Pacific (NCTAMS PAC) and under the installation management authority of Joint Region Marianas. It has been variously referred to as Naval Communications Station Guam (NCS Guam), NCS or NCTS Finegayan, and North Finegayan. NCTS Guam provides communications support in the areas of responsibility for the U.S. Third, Fifth, and Seventh Fleets.

Marine Corps Base (MCB) Camp Blaz is a U.S. Marine Corps facility located in the village of Dededo in northwest Guam.

Chaqui'an Massacre Site, at Chalan Emsley in Yigo on Guam, was the site of a massacre in 1944 by Japanese soldiers of 45 native Chamorro men. The men were from 15 to 76 years old, and were dressed in civilian clothes. They were tied and were beheaded. The site, a 1.94 acres (0.79 ha) area, was listed on the National Register of Historic Places in 2016. The NRHP nomination states:Chagui'an represents the intense suffering and hardship endured by the indigenous population (Chamorros) of the U.S. Unincorporated territory of Guam during the 31 month Japanese wartime occupation of the island. Of the many incidents of Japanese military brutality on Guam, the largest known single act of violence is the beheading of 45 Chamorros by the Imperial Japanese Army at Chagui'an. The massacre site exemplifies the atrocities committed on Micronesian populations in the Pacific Theater of Operations and epitomizes the tragic extremes that can be inflicted on small, marginalized, native populations without political authority or the prerogative of military sanction in global conflicts. Chagui'an is one of only a handful of war-related massacres of civilians that occurred on U.S. soil during World War II.

The South Finegayan Latte Stone Park is a small public park and archaeological site at 74 Golden Shower Lane in Dededo, Guam. Located in the United States Navy housing area known as Finegayan, it encompasses the remains of a latte stone house site, which are the only remnants of a once-extensive Chamorro village in the area. Radiocarbon dating and other evidence place the occupation period at this site at c. 1700, and for only a relatively short period of time (about 100 years). The site was listed on the National Register of Historic Places in 1975.

Andersen Air Force Base (Andersen AFB, AAFB) (IATA: UAM, ICAO: PGUA, FAA LID: UAM) is a United States Air Force base located primarily within the village of Yigo in the United States territory of Guam. The host unit at Andersen AFB is the 36th Wing (36 WG), assigned to the Pacific Air Forces Eleventh Air Force. As a non-flying wing, the 36 WG's mission is to provide support to deployed air and space forces of USAF, foreign air forces to Andersen, and tenant units assigned to the base. Andersen AFB was placed under the installation management authority of Joint Region Marianas in October 2009, along with Naval Base Guam. The two bases are about 30 miles (48 km) apart at opposite ends of the island. Established in 1944 after the Liberation of Guam as North Field, it is named for Brigadier General James Roy Andersen (1904–1945). The most important U.S. air base west of Hawaii, Andersen is one of the four Air Force Bomber Forward Operating Locations and the only base in the Western Pacific that can permanently service U.S. heavy strategic bombers, including B-1B, B-2, and B-52 bombers. Andersen is one of two critical bases in the Asia-Pacific region, the other being Diego Garcia in the Indian Ocean. Due to Guam's almost unrestricted airspace and the close proximity of the Farallon de Medinilla Island, a naval bombing range 184 miles (296 km) north, the base is in an ideal training location.

The Mataguac Hill Command Post, near Yigo, Guam, has significance from 1944 during the Battle of Guam. It was the location of "the last organized resistance by the Japanese to the American liberation of Guam during World War II and therefore is considered a highlight of the invasion of Guam.": 3  It was listed on the National Register of Historic Places in 1975. The listing's two contributing structures are two concrete bunkers built by the Japanese military early in 1944, in a small gully at a location where fresh water was present and where thick bamboo groves may have concealed the area from American military air reconnaissance and attack. The smaller bunker is 12.4 by 5.8 metres (41 ft × 19 ft) and about 2.5 metres (8.2 ft) tall. The main portion of the larger bunker, about 10 metres (33 ft) away, is 15 by 4 metres (49 ft × 13 ft) and about 4 metres (13 ft) tall; it is L-shaped. It was used as a command post by Japanese Lt. Gen. Hideyoshi Obata. The position was attacked on August 11, 1944 by the 306th Regiment of the 77th Infantry Division of the U.S. Army. "Throwing white phosphorus grenades and using pole charges and more than 400 blocks of TNT, they blew up the front of the caverns, closing them." The bunkers were opened by American engineers three days later and 60 bodies were found, including that of General Obata. There are other abandoned concrete structures to hold water from Mataguac Spring, not far away, that were built by the U.S. Army Corps of Engineers, after World War II.

The Yigo Guam Temple is a temple of the Church of Jesus Christ of Latter-day Saints (LDS Church) in Yigo, Guam. The intent to build the temple was announced on October 7, 2018, by church president Russell M. Nelson, during general conference.

On 23 February 2008, Spirit of Kansas, a B-2 Spirit stealth bomber of the United States Air Force, crashed on the runway moments after takeoff from Andersen Air Force Base in Guam. The aircraft was destroyed, but both crew members successfully ejected. The accident marked the first operational loss of a B‑2 bomber, and as of 2024 remains one of two lost B-2s since another damaged B-2 had to be retired due to repair costs after an on-board fire. With an estimated loss of US$1.4 billion, considering only the cost of the aircraft, it was also the most expensive aircraft crash in history.