Aerospace Data Facility-East

Fort Belvoir is a United States Army installation and a census-designated place (CDP) in Fairfax County, Virginia, United States. It was developed on the site of the former Belvoir plantation, seat of the prominent Fairfax family for whom Fairfax County was named. It was known as Camp A. A. Humphreys from 1917 to 1935 and Fort Belvoir afterward. Fort Belvoir is home to a number of significant United States military organizations. With nearly twice as many workers as The Pentagon, Fort Belvoir is the largest employer in Fairfax County. Fort Belvoir comprises three geographically distinct areas: main base, Davison Army Airfield, and Fort Belvoir North.

The Defense Contract Audit Agency (DCAA) is an agency of the United States Department of Defense under the direction of the Under Secretary of Defense (Comptroller). It was established in 1965 to perform all contract audits for the Department of Defense. Previously, the various branches of military service were responsible for their own contract audits. The DCAA's duties include financial and accounting advisory services for the Department of Defense in connection with negotiation, administration and settlement of contracts and subcontracts.

The narrow gauge railway at Camp A. A. Humphreys was a 20 miles (32 km) long 2 ft (610 mm) gauge military railway at what is now Fort Belvoir, Virginia .

The Geospatial Research Laboratory is a component of the Engineer Research and Development Center (ERDC), a US Army Corps of Engineers (USACE) laboratory organization whose mission is to "Provide science, technology, and expertise in engineering and environmental sciences in support of our Armed Forces and the Nation to make the world safer and better." The laboratory is colocated with the Army Geospatial Center in the Humphreys Engineer Center adjacent to Fort Belvoir. The headquarters is located in Vicksburg, Mississippi, on the site of an antecedent organization, the Waterways Experiment Station. GRL conducts geospatial research, development, technology and evaluation of current and emerging geospatial technologies that will help characterize and measure phenomena within the physical (terrain) and social (cultural) environments encountered by the Army. GRL research areas and capabilities include terrain analysis and reasoning; passive and active spectral signature analysis; fluorescence; photogrammetry; terrain visualization; precision surveying and mapping; image analysis; data management; geographic information systems; data/image fusion; and spatio-temporal reasoning and numerical analysis.

The National Museum of the United States Army is the official museum for the history of the United States Army and is just outside Washington, D.C. It opened on November 11, 2020. The objectives of the museum are to honor America's soldiers, preserve Army history, and educate the public about the Army's role in American history. The U.S. Army announced April 16, 2020 that the museum would delay its opening due to the COVID-19 pandemic.The National Museum is located on 84 acres at Fort Belvoir, Virginia, 20 miles south of Washington, D.C. Ground was broken for the museum in September 2016, and it was scheduled to open on June 4, 2020. That opening was delayed as some of the gallery finishing work was suspended in response to COVID-19 which impacted the project timeline. The main building is approximately 185,000 square feet and displays selections from the United States Army Center of Military History. Outside this facility is a park with gardens and a parade ground. Space is included to accommodate ceremonies, reenactments, lectures, educational programs, and reunions.

The Defense Threat Reduction Agency (DTRA) is both a defense agency and a combat support agency within the United States Department of Defense (DoD) for countering weapons of mass destruction (WMD; chemical, biological, radiological, nuclear, and high explosives) and supporting the nuclear enterprise. According to the agency's website its mission states that "DTRA provides cross-cutting solutions to enable the Department of Defense, the United States Government, and international partners to Deter strategic attack against the United States and its allies; Prevent, reduce, and counter WMD and emerging threats; and Prevail against WMD-armed adversaries in crisis and conflict." The agency is headquartered in Fort Belvoir, Virginia.

Hayfield Secondary School is a secondary school (grades 7–12) in the Fairfax County Public Schools system of Virginia. It opened in 1968 and graduated its first senior class in 1971.

Hayfield is a census-designated place (CDP) in Fairfax County, Virginia, United States. The population as of the 2010 census was 3,909.It is located in southeastern Fairfax County, bordered by Kingstowne to the northwest, Rose Hill to the north, Groveton to the east, and Fort Belvoir to the south. The main road through Hayfield is Telegraph Road, which leads northeast 5 miles (8 km) into Alexandria and southwest 4 miles (6 km) to U.S. Route 1 at Pohick. According to the U.S. Census Bureau, the Hayfield CDP has a total area of 1.4 square miles (3.6 km2), of which 1.3 square miles (3.3 km2) is land and 0.1 square miles (0.3 km2), or 8.14%, is water. About a fifth of the area (199.9 acres (0.3 sq mi; 0.8 km2)) is taken up by the United States Coast Guard Navigation Center.

The Center for Army Analysis (CAA), formerly US Army's Center for Strategy and Force Evaluation, is a US Army organization under the Deputy Chief of Staff G-8 (DCS G-8) which is responsible for analyses that impact the Army at the strategic or institutional level.

The Woodlawn Quaker Meetinghouse is located at 8890 Woodlawn Road in Alexandria, Virginia, United States. The meetinghouse and its associated cemetery are significant for their role in the Quaker community in this area of Virginia in the mid to late 19th century. The meetinghouse itself is also significant for its Quaker Plain Style architecture. The property was added to the National Register of Historic Places on May 21, 2009, and the listing was announced as the featured listing in the National Park Service's weekly list of May 29, 2009.The original meetinghouse, now the southern half, was built in 1853. The northern half was added between 1866 and 1869. Both halves are wood frame, one story, gable roofed structures. The style reflects the Quaker belief in simplicity and lack of adornment. The rectangular building faces east, with two entrances on the long side of the rectangle. One entrance was for women, and one for men. On the interior, there is a center wall with window-like opening. The openings can be shuttered to accommodate separate meetings for men and women. The seating is historic, simple, wooden benches. The porch that currently wraps around the building was added at a later time. Union soldiers occupied the building during the American Civil War, and carved their names and initials to the right of what was then the only entryway.

Accotink is an unincorporated community in Fairfax County, Virginia, United States. Accotink is located along Accotink Creek within Fort Belvoir.

The Pope–Leighey House, formerly known as the Loren Pope Residence, is a suburban home in Virginia designed by American architect Frank Lloyd Wright. The house, which belongs to the National Trust for Historic Preservation, has been relocated twice and sits on the grounds of Woodlawn Plantation, Alexandria, Virginia. Along with the Andrew B. Cooke House and the Luis Marden House, it is one of the three homes in Virginia designed by Wright.