Piscataway, Maryland

White Hall is an unincorporated community in Prince George's County, Maryland, United States. White Hall is located 2.5 miles (4.0 km) northeast of Accokeek.

Warburton Manor was the colonial home, patented in 1661, of the Digges Family, descendants of Edward Digges, who was Governor of Virginia from 1652 to 1668. Digges was an intimate friend of George and Martha Washington, who visited the house many times. George Washington spent his forty-third birthday at Warburton Manor. Warburton Manor occupied a strategic site on the Potomac River and today it is the site of Fort Washington, designed by Pierre Charles L'Enfant in 1814.

Accokeek (), "at the edge of the hill" in Algonquin, is a census-designated place (CDP) located in Prince George's County, Maryland, United States. The CDP is located on the Potomac River, borders Charles County and is approximately 17 miles from Washington. It is a part of the Washington metropolitan area. The population of the CDP, as of the 2020 United States Census was 13,927.While the area around Accokeek was inhabited by Native Americans since approximately 2,000 BCE, John Smith was the first European to settle the area in 1608. In 1990, the United States Census Bureau officially made Accokeek a CDP.

Bellevue is a historic plantation house located at 200 Manning Road East, in Accokeek, Prince George's County, Maryland, United States. This Greek Revival style home was constructed in about 1840. It is one of only three surviving examples in Prince George's County of the once-popular Tidewater house style, typical of successful small plantations of that period. Bellevue is in excellent condition, and retains its freestanding chimneys with brick pent, as well as a roughly contemporary kitchen wing. The house stands on a five-acre, partially wooded lot which exemplifies its original plantation setting.Bellevue was listed on the National Register of Historic Places in 1986.

Friendly is an unincorporated area and census-designated place (CDP) in Prince George's County, Maryland, United States, with an African-American majority population, located a few miles south of Washington, D.C. The population was 9,937 at the 2020 census.Friendly had its own rural post office in the early 20th century, and is now under the mailing address Fort Washington. The name "Friendly" is most associated with Friendly High School, which serves most of the greater Fort Washington area. The Friendly area was largely rural until about 1960 and has steadily grown with single-family housing developments. At least five new residential neighborhoods are currently under construction in the area. Allentown Road connects Friendly with Andrews Air Force Base.

Tantallon is an unincorporated community in Prince George's County, Maryland, United States. Although a separate community, it is a part of the census-designated place (CDP) of Fort Washington. The ZIP code for the community is 20744. Tantallon reported as a census-designated place by the U.S. Census Bureau in 1980, which included much of the northern half of Fort Washington's census area. The population recorded was 9,945.

Potomac Airfield (ICAO: KVKX, FAA LID: VKX), also known as Potomac Airport (listen ), is a privately owned, public-use airport located in the Friendly census-designated place in unincorporated Prince George's County, Maryland, United States (just outside Washington, D.C.); it has a Fort Washington postal address. It is a general aviation airport, and there is no scheduled airline service available. Potomac Airfield is one of the "Maryland 3" airports located within the Washington, D.C. Flight Restricted Zone (FRZ), so it is subject to the Special Flight Rules Area restrictions. It is located just 1.10 nautical miles (1.27 mi) west of the slightly larger Washington Executive Airport (aka Hyde Field). Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Potomac Airfield is assigned VKX by the FAA but has no designation from the IATA.

The Interagency Training Center (ITC), also known as the Fort Washington Facility, is a National Security Agency (NSA) Central Security Service (CSS) school and training facility for technical surveillance counter-measures (TSCM) located in Fort Washington, Maryland. The U.S. government requires that all TSCM technicians be certified at the ITC. The facility previously housed the Department of Defense's Office of Special Technology, which managed technology development and acquisition programs such as the Technical Support Working Group. The site is administered by the U.S. Navy.

The Canterbury School also known as Canterbury High School and also simply as Canterbury, was a private, college preparatory secondary school located in Accokeek, Maryland, on the grounds of Christ Episcopal Church. It opened in 1961 and closed in 2000.

Christ Church Accokeek is an Anglican parish church and cemetery in Accokeek, Maryland. Founded in 1698 as a chapel of ease, the present brick structure dates to 1747 (with substantial reconstruction and addition in the 1850s) and the cemetery to 1775. In 2021, after decades of conflict with the Episcopal Diocese of Washington, the congregation left the Episcopal Church and joined the Anglican Church in North America. The church is listed on the Maryland Historical Trust's Maryland Inventory of Historic Properties.

Harmony Hall, located in Fort Washington, Maryland, is managed by the United States National Park Service as part of the National Capital Parks-East system. It has been a National Park Service site since 1966. Harmony Hall is a 2+1⁄2-story Georgian country house built of red brick during the eighteenth century. It is surrounded by 65 acres (26 ha) of land on Broad Creek, a Potomac River tributary.The house was built circa 1769 by Enoch Magruder. After his death, the estate was given to his daughter, Sarah and her husband, Col. William Lyles. The estate was originally called Battersea, but came to be called Harmony Hall some time after 1792, when it was rented to brothers John and Walter Dulaney Addison and their wives. The name "Harmony Hall" commemorates the two couples' harmonious coexistence. Harmony Hall was sold by the Lyles family in 1850. After passing through other owners, the manor was purchased in about 1892 by Robert Stein, his brother Richard, and brother-in-law Joseph Adler. The three had immigrated from Silesia, and engaged in truck farming nearby. They lost control of the manor house in 1929, selling it to Charles Collins, but continued to farm and operate a general store in the area.The home was extensively restored beginning in 1927 by Charles Wallace Collins (1879–1964), a lawyer, writer, and librarian who made his home in Harmony Hall and devoted himself to its restoration after he retired. Collins bequeathed the house to the National Park Service.Beginning in 1985, Frank Calhoun leased the mansion and lived there, investing more than $1 million into the house and its upkeep. After he fell behind on renovations in his early 60s, the Park Service asked Calhoun to leave in 1999. The property has been empty and in accelerating decline since then. Though the Park Service periodically sends in staff and enlists students to clean up the grounds, Harmony Hall competes with many other historic properties for attention and funding.The home has been listed on the National Register of Historic Places since 1980, at which time its condition was described as "excellent". As of January 2010, Harmony Hall is closed to the public.Harmony Hall is also the name given to a community center building, on adjacent property, owned by the Maryland-National Capital Park and Planning Commission and used as their southern area headquarters office. The center includes a fitness center and hosts concerts, stage plays, art exhibits, arts classes, scout meetings, and other cultural programs. The building was originally an elementary school.

Fort Washington is an unincorporated area and census-designated place in Prince George's County, Maryland, United States. It borders the Potomac River, situated 20 miles south of the downtown Washington, DC. As of the 2020 census it had a population of 24,261. The Fort Washington community is located west of Maryland Route 210, with some additional area to the east of the highway.