Mayfield Fortification

Osbourn Park High School is a Prince William County, Virginia public high school in a small county island between the cities of Manassas and Manassas Park, southwest of Washington D.C. Osbourn Park serves the mid-part of the county. The community consists of business, professional, U.S. Government and military residents. Osbourn Park has also been designated as The Biotechnology Center and houses two other unique programs: Allied Health and NJROTC. It has at various times had a student population ranging from 1900 to 3200, but it is currently around 2500 grades 9-12.

Signal Hill is a historic Confederate Army military site in Prince William County, Virginia. It is from this location, a signal station atop the hill, that Confederate observers in 1861 spotted Union Army troops attempting to cross Sudley Ford. The Confederate response to this maneuver began the First Battle of Bull Run.Part of Signal Hill is now part of a public park owned by the city of Manassas Park; the rest is part of a preservation area belonging to a neighborhood association. The site was listed on the National Register of Historic Places in 1989.

Conner House is a historic house located in Manassas Park, Virginia. The main section was built about 1810, with a later wing added in 1855. It is a two-story, gable-roof, stone residence. The Conner House served from July to November 1861 as the headquarters of General Joseph E. Johnston, commander of the Confederate Army during the first several months of its existence. In 1973 the Town (now City) of Manassas Park purchased the house and yard.It was added to the National Register of Historic Places in 1981.

Seton School is an accredited, private, co-educational Catholic junior & senior high school located in Manassas, Virginia founded in 1973 by Anne Carroll, wife of Dr. Warren Carroll. According to its website, Seton teaches orthodox, traditional Catholicism in harmony with the Magisterium of the Catholic Church and its leader, Pope Francis. Its mission statement emphasizes Catholicism in the classroom as well as the importance of discipline. It was awarded a place on the Cardinal Newman Society's Catholic High School Honor Roll in 2012, and again in 2014

Liberia is a historic plantation house located at Manassas, Virginia, United States. It was built about 1825, and is a two-story, five-bay, Federal style brick dwelling. It has a parapet side-gable roof and a molded brick cornice with a saw-tooth design. It has a single-pile, modified central passage plan. During the American Civil War, it was used as headquarters by both Confederate and Union forces. Both Presidents Abraham Lincoln and Jefferson Davis, in addition to other statesmen, visited Liberia during the War.The house was acquired by the City of Manassas on December 31, 1986, for use as a museum. The house is being restored and is open for special events and tours by appointment.It was added to the National Register of Historic Places in 1980.

Osbourn High School is a public school for grades 9–12 located in Manassas, Virginia, United States and the sole high school of the Manassas City Public Schools system.

Manassas Park station is a Virginia Railway Express station in Manassas Park, Virginia. The station serves the Virginia Railway Express Manassas Line, and shares the right-of-way with Amtrak's Cardinal and Crescent trains; however, no Amtrak trains stop here.

The Manassas Water Tower is a historic water storage facility at 9000 Quarry Street in Manassas, Virginia. It is a steel structure 147 feet (45 m) in height, and is typical in style for its 1914 construction date, with a steel trestle supporting a tank with a hemispherical base and conical roof. It has a capacity of 75,000 US gallons (280,000 L; 62,000 imp gal). It was built near one of the city's six water wells, and is one of six water towers in the state with a hemispherical bottom. It is also the oldest water tower in the region.It was added to the National Register of Historic Places in 2016.

Manassas Park is an independent city in the U.S. state of Virginia. As of the 2020 census, the population was 17,219. Manassas Park is bordered by the city of Manassas and Prince William County. Manassas Park is a part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area.

Old Town Manassas, or the Manassas Historic District, is a national historic district located at Manassas, Virginia. It encompasses 206 contributing buildings and 1 contributing object in the central business district and surrounding residential area of city of Manassas.

Manassas station is a train station in Manassas, Virginia. It was originally built by the Southern Railway in 1914. Today it serves as a station along the Virginia Railway Express Manassas Line, as well as a stop on Amtrak's Cardinal, Crescent, and Northeast Regional train routes.

Prince William County Courthouse is a historic courthouse located at 9248 Lee Avenue, Manassas, Prince William County, Virginia. Rehabilitated in 2000–2001, it currently houses some offices of the Prince William County clerk, and the historic courtroom upstairs can be rented for events.