Glassmanor, Maryland

Forest Heights is a town in Prince George's County, Maryland, United States, and is part of the larger postal designation of Oxon Hill. The town straddles both sides of dual-lane Maryland Route 210 and includes two elementary schools. Per the 2020 census, the population was 2,658.

Oxon Run is a tributary stream of Oxon Creek and the Potomac River in Prince George's County, Maryland, and Washington, D.C. In early maps, the stream is usually called "Oxen Run" and in 1892 the U.S. Geological Survey still labelled the stream as "Oxen Run" on its maps. Late in that year they changed the spelling they used, and others have followed suit, though it's unclear what led to the spelling change. Government officials and mapmakers often don't make a distinction between Oxon Creek and Oxon Run, instead treating Oxon Creek as a continuation of Oxon Run, but USGS still does. USGS first started labeling it as Oxon Creek in 1892.

The Butler House was a historic home of importance to local African American history and located at Oxon Hill, Prince George's County, Maryland, United States. Henry Alexander Butler, a free African American man from Charles County, moved with his family to the property in 1853, and the property has been continuously associated with the Butler family. Henry Butler became a Reconstruction era community leader, serving as trustee of the nearby Freedmen's Bureau school. The Butler House was a 2+1⁄2-story, one room deep wood-frame and log residence covered in cast stone. It sat in a secluded, forested area, adjacent to the Oxon Hill Children's Farm. As of December 2010, the house is in a severely dilapidated condition. In 2020 the house collapsed and the property was sold in 2019. The Butler House is listed on the National Register of Historic Places in 2005.

Washington Highlands is a residential neighborhood in Southeast Washington, D.C., in the United States. It lies within Ward 8.

Bellevue/William O. Lockridge Neighborhood Library is part of the District of Columbia Public Library (DCPL) System. It was originally opened to the public in 1959. It was renovated with a design by British architect David Adjaye and named after activist William O'Neal Lockridge.

Fort Greble was an American Civil War-era Union fortification constructed as part of the defenses of Washington, D.C. during that war. Named for First Lieutenant John Trout Greble, the first West Point graduate killed in the U.S. Civil War, it protected the junction of the Anacostia and Potomac rivers, and from its position on a bluff in the Congress Heights, precluded any bombardment of the Washington Navy Yard and southeastern portions of the city. It was supported by Fort Carroll to the northeast and Fort Foote to the south. It never fired a shot during the war, and after a brief stint as a U.S. Army Signal Corps training facility, was abandoned and the land returned to its natural state. As of July 2007, the site of the fort is a community park.

Oxon Hill is an unincorporated area and census-designated place (CDP) in southern Prince George's County, Maryland, United States. Oxon Hill is a suburb of Washington, located southeast of the downtown district and east of Alexandria, Virginia. It contains the new 300-acre (120 ha) National Harbor development on the shore of the Potomac River. For the 1990 and 2000 censuses, the United States Census Bureau defined a census-designated place consisting of Oxon Hill and the adjacent community of Glassmanor, designated Oxon Hill-Glassmanor, for statistical purposes. As of the 2010 census, Oxon Hill was delineated separately and had a population of 17,722. Per the 2020 census, the population was 18,791.

Oxon Cove Park and Oxon Cove Farm is a national historic district that includes a living farm museum operated by the National Park Service, and located at Oxon Hill, Prince George's County, Maryland. It is part of National Capital Parks-East. It was listed on the National Register of Historic Places in 2003.The park provides an excellent resource for environmental studies, wildlife observing, fishing, and other recreational activities made possible by easy access to the Potomac River. Fourteen buildings and two structures are located in the historic district and associated with the property's sequential development as a plantation, an institutional agricultural complex, and a farm museum.

Shepherd Parkway is part of the Civil War Defenses of Washington. It includes two forts (Forts Greble and Carroll), of which some remains still exist. The parkway runs along the high ground opposite the Anacostia Freeway (Interstate 295) from Joint Base Anacostia–Bolling in the District of Columbia. Shepherd Parkway is bordered on the north by St. Elizabeths Campus and the District of Columbia neighborhoods of Congress Heights and Bellevue and on the south (near Oxon Run) by Bald Eagle Hill.

Blue Plains Advanced Wastewater Treatment Plant, located at 5000 Overlook Ave SW, Washington, DC 20032, is the largest advanced wastewater treatment plant in the world. The facility is operated by the District of Columbia Water and Sewer Authority (DC Water). The plant opened in 1937 as a primary treatment facility, and advanced treatment capacity was added in the 1970s and 1980s. The effluent that leaves Blue Plains is discharged to the Potomac River and meets some of the most stringent permit limits in the United States.

Potomac High School is a public high school located in the Glassmanor census-designated place in unincorporated Prince George's County, Maryland, United States, with an Oxon Hill postal address. It is a part of Prince George's County Public Schools. The principal is Nathaniel R. Laney. The approximate enrollment as of August 2010 stands at 1,216 students in grades nine through twelve. The school hours are from 7:45am to 2:25pm. Potomac operates on an alternating A/B-Day block schedule. There is a mandatory uniform policy at this school. Potomac features a school-wide America's Choice School Design signature program as well as an expansive "smaller learning communities" program, that essentially breaks the school down into smaller schools or "career academies". The school serves: all of Glassmanor CDP, the Town of Forest Heights, most of Hillcrest Heights CDP, a portion of Marlow Heights CDP, and a portion of Silver Hill CDP.

Frank W. Ballou Senior High School is a public school located in Washington, D.C., United States. Ballou is a part of the District of Columbia Public Schools. The principal is Willie Jackson (a 1987 alumnus).