Geospatial Research Laboratory

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.

Aerospace Data Facility-East (ADF-E), also known as Area 58 and formerly known as Defense Communications Electronics Evaluation and Testing Activity (DCEETA), is one of three satellite ground stations operated by the National Reconnaissance Office (NRO) in the continental United States. Located within Fort Belvoir, Virginia, the facility is responsible for the command and control of reconnaissance satellites involved in the collection of intelligence information and for the dissemination of that intelligence to other U.S. government agencies.

Franconia is a census-designated place (CDP) in Fairfax County, Virginia, United States. The population was 18,245 at the 2010 census, down from 31,907 in 2000 due to the splitting off of part of it to form the Kingstowne CDP. Located just southwest of Alexandria, Franconia has existed as a community since the 1870s, when a station by that name opened on the RF&P Railroad; however, like most of the surrounding area, it only began to develop into its present, suburban form in the 1950s. The CDP extends south to just north of the border of Fort Belvoir, encompassing neighborhoods such as Manchester Lakes and Windsor Estates. Street addresses have Alexandria ZIP Codes 22310 and 22315. It is near the Springfield Mall shopping area and the Franconia–Springfield Washington Metro station.

Belvale is an historic house in present-day Fairfax County, Virginia built between 1763 and 1766 by George Johnston (1700-1766), member of the Virginia Assembly 1758-1766, friend of Patrick Henry, and legal advisor to George Washington, who was a frequent visitor to the home. The home's original lands, described as lying on "Doeg's Run", were first granted on July 6, 1698 to Richard Carpenter, who bequeathed them in 1750 to his wife Mary and daughter Ann, who sold the property to Johnston in 1763. Belvale is sometimes called "Belle Vale Manor" in historical records. Belvale was Johnston's country seat; his town home was in the city of Alexandria.The grounds of Belvale are reputed to harbor a ghost of a young man killed in a duel who was buried under a cedar tree, reputedly with Washington's assistance in digging the grave and planting the cedar tree. The Historic American Buildings Survey documentation of the house, which is a private residence, states that a cemetery which may have been a slave burial ground is on the property, though it is no longer extant.

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 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.

Okeley Manor was an early 19th-century plantation in Fairfax County, Virginia, United States. Okeley, the residence of prominent Alexandria physician Richard Chichester Mason (1793–1869), was one of the principal Mason family estates in Northern Virginia. Mason' plantation house was used as a hospital during the American Civil War and burned to prevent the spread of smallpox.

Franconia–Springfield is a Washington Metro rapid transit station and Virginia Railway Express commuter rail station located in Springfield, Virginia, United States. The station is the southwestern terminus of the Metro Blue Line and an intermediate station on the VRE Fredericksburg Line. It is also a major bus terminal for Fairfax Connector buses, plus other local and intercity bus routes. The station has one island-platform serving the two Metro tracks, plus two side platforms serving the RF&P Subdivision on which the Fredericksburg Line runs. Located in a suburban area near I-95, the station is primarily used by commuters from more distant suburbs. Its parking garage is the largest on the Metro system, with 5,069 spaces. With 6,970 average daily riders by a May 2016 count, Franconia–Springfield was the 8th-most-used Metro station in Virginia.The VRE stop opened in 1995, followed by the Metro station on June 29, 1997. From 2003 to 2010, the station was also served by Amtrak Northeast Regional intercity rail trains.

Engleside Christian School is a private pre-kindergarten through 6th grade Christian school in Alexandria, Virginia. It is Baptist by affiliation and a member of the Old Dominion Association of Christian Schools, a chapter of the AACS. Engleside Christian School (ECS) offers its students dedicated Christian teachers and favorable teacher to student ratios. ECS uses a phonics based reading program and advanced curriculum with technology integration, but provides a well-rounded experience with quality music programs and various service opportunities. There are daily Bible classes as well as a weekly chapel program. As a religious program, ECS and its various programs are exempt from state licensure.