Compton Bassett (Upper Marlboro, Maryland)

The Ashland Home is a historic home located in Upper Marlboro, Prince George's County, Maryland, United States. It is a 2+1⁄2-story, hip-roofed frame dwelling with fine Victorian Italianate decorative detail. The home was built in 1866-1867 by William Beanes Hill of Compton Bassett for his son, William Murdock Hill. The house has been continuously associated with the prominent Hill family. The home is one of only a few significant frame dwellings of the Italianate style which survive in the county. It has a simple square floor plan, with cross gables in each plane of the hip roof. Also on the property are historic outbuildings.Ashland was listed on the National Register of Historic Places in 1994.

Waysons Corner is an unincorporated community in Anne Arundel County, Maryland, United States, 2.6 miles (4.2 km) east of Upper Marlboro. Waysons Corner is located at the junction of Maryland routes 4 and 408 (Southern Maryland Boulevard), where the former changes names to Pennsylvania Avenue.

Marlboro Meadows is an unincorporated community and census-designated place (CDP) in Prince George's County, Maryland, United States. Per the 2020 census, the population was 3,655. It was newly delineated for the 2010 census prior to which the area was part of the Greater Upper Marlboro census-designated place.

The Nanjemoy Formation is a geologic formation pertaining to both the Wilcox Group and the Pamunkey Group of the eastern United States, stretching across the states of Virginia, Maryland, and District of Columbia. The formation crops out east of the Appalachians and dates back to the Paleogene period. Specifically to the Ypresian stage of the Eocene epoch, about 55 to 50 Ma or Wasatchian in the NALMA classification, defined by the contemporaneous Wasatch Formation of the Pacific US coast. The about 20 metres (66 ft) thin formation crops out in a narrow irregular band and only in certain of the many creeks of the Maryland peninsula and on the southern side of the Potomac River in Virginia. The two members the formation was divided into by Clark and Martin in 1901; Potapaco and Woodstock, represent different phases in the basin history. The lower Potapaco Member is much more clayey, described as marl, than the upper Woodstock Member, probably characteristic of less storm influences in the shallow shelf sediments. The formation has provided a wealth of fossils of mainly fish, but also mammals, reptiles, birds and flora. The presence of the sharks Otodus obliquus and Carcharocles aksuaticus, as well as various other shark and ray species are notable. Crocodylian, snake, turtle, mammal, and bird remains have all been found in the Nanjemoy Formation.

Marlboro Motor Raceway (MMR) is a now-defunct motorsports park located in Prince George's County, just outside Upper Marlboro, Maryland. MMR closed after the 1969 season and local Sports Car Club of America (SCCA) racing moved to the more advanced Summit Point Motorsports Park due to safety concerns and issues with MMR's management. The remains of the track are still visible from U.S. Route 301 and the entire track layout can still be seen in modern satellite imagery.

The Prince George's County Sheriff's Office (PGSO), officially the Office of the Sheriff, Prince George's County, provides law enforcement services in Prince George's County, Maryland in the United States. Its headquarters are located in Upper Marlboro, near the Depot Pond. The sheriff is the chief law enforcement officer of Prince George's County and is elected every four years. There are no term limits for the sheriff.Created in 1696, the traditional duties of the sheriff are keeper of the public peace and the enforcement arm of the county court, analogous to the U.S. Marshals Service. The PGSO has a relatively long history compared to other police departments and sheriff's offices in Maryland. The PGSO was involved with events that occurred during the burning of Washington and affected the writing of "The Star-Spangled Banner". Prior to 1931, the PGSO was the sole law enforcement organization of the county.Today, the duties of the sheriff include law enforcement services of the two county courthouses and surrounding property, service of court-ordered warrants, writs, protective orders, and other injunctions, and limited patrol responsibility with the County Police. The Domestic Violence Unit has expanded its role in the county to include responding to calls for service that are domestic-related. The creation of the School Resource Deputy division has placed a deputy sheriff at all of the local high schools, replacing the County Police. All other law enforcement services of the county are provided by multiple agencies but mostly left to the separate Prince George's County Police Department (PGPD), though some responsibilities are shared by both agencies. The PGSO, like most other county-level law enforcement agencies in the United States, is a progressive agency with an array of services, from the Specialized Services Team (dealing with high-risk arrest warrants and barricaded situations) to community services aiding the county's residents in safety education. The PGSO was accredited for the first time by the Commission on Accreditation for Law Enforcement Agencies, Inc. (CALEA) in 2018.

Bowling Heights is a historic home located in Upper Marlboro, Prince George's County, Maryland, United States. It is a large 2+1⁄2-story frame house constructed in 1877 in the High Victorian Gothic style.Bowling Heights was listed on the National Register of Historic Places in 1982.

Mount Pleasant is 2+1⁄2-story brick structure with a gambrel roof and is about two-thirds its original length. It is located near Upper Marlboro in Prince George's County, Maryland. Mount Pleasant was patented in 1697 to Richard Marsham, whose wife Anne was the daughter of Leonard Calvert, Governor of Maryland. Their grandson, Marsham Waring, inherited the home from his grandfather in 1713. His son, Richard Marsham Waring had a son, Richard Marsham Jr., born in 1733, who then inherited Mount Pleasant and Patented and Certified the tract of land dubbed "Mount Pleasant Enlarged" in 1760. On August 21, 1764, Richard Marsham Jr. sold the 451+3⁄4 acre tract of land to his brother John for £474.6s.9d. John later built the standing house in the years between 1764 and 1785 (conflicting dates). John died in 1813 and was buried at Mount Pleasant.Mount Pleasant is an example of an almost distinctively Maryland style of house—the English gambrel roof dwelling in brick, with the steep gambrel which has dormers almost flush with the second pitch of the roof. This house is significant primarily for its architecture and as a representative example of a more modest type of mid-Georgian dwelling than others in Maryland such as Montpelier, and probably a closer reflection of the architectural ancestry than the Palladian country house. As a more modest dwelling Mount Pleasant is an unusual survivor.Thomas Fielder Bowie is interred in the Waring family burial ground on this site.

St. Mary's Beneficial Society Hall, constructed in 1892, is a historic building located in Upper Marlboro, Prince George's County, Maryland. The Hall, an excellent example of an African American multi-purpose building, served as a meeting place, social and political center, and house of worship for African Americans living in a segregated society. It is located nearly across the street from St. Mary's Catholic Church, with which it is historically associated. It is a one-story wood frame gable-front building, In 1988, a law firm acquired the building and converted it to office space.It was listed on the National Register of Historic Places in 2005.

Darnall's Chance, also known as Buck House, Buck-Wardrop House, or James Wardrop House, is a historic home located at 14800 Governor Oden Bowie Drive, in Upper Marlboro, Prince George's County, Maryland, United States. It is named after Colonel Henry Darnall, a wealthy Roman Catholic planter, who was the Proprietary Agent of Charles Calvert, 3rd Baron Baltimore and who served for a time as Deputy Governor of the Province. The house itself was built c. 1742 by a merchant named James Wardrop who bought some of Darnall's land from Eleanor Darnall Carroll and her husband Daniel Carroll, a politician and wealthy planter. Wardrop enslaved 32 people at the house.Today, Darnall's Chance houses the Darnall's Chance House Museum, a historic house museum which opened to the public in 1988.

The Olde Towne Inn (“O.T.I”) is a restaurant located in Upper Marlboro, Maryland, USA, previously known as the Judges Chambers. Since 2006 the restaurant has been owned by chef and restaurateur, Donnell Long, an African American and Washington, DC native.

The Show Place Arena is a 5,800-seat multi-purpose arena just south of Upper Marlboro, Maryland, which is used for sporting events, concerts, boxing and professional wrestling events, consumer shows, trade shows, religious services, graduations and other events. Opening in 1993, the Show Place Arena contains a 35,360-square-foot (136' by 260') floor allowing it to be used for various events such as concerts and trade shows. There are telescopic bleachers which can be placed in an open position to allow more permanent seating for events. In addition, equestrian, rodeo and other events use the arena with 6-8 inches of stonedust on the concrete floor to provide the preferred footing for equestrian events. The arena is currently home to horse shows, computer shows, train shows, concerts, religious events, cultural festivals, trade shows and graduations. The facility was also the venue for the 2004–2005 season of the American Basketball Association Maryland Nighthawks as well as home of the Patriot League Men's and Women's Basketball Championship in 2002-2004, the Chesapeake Icebreakers minor league hockey team (1997–1999), the Chesapeake Tide and Maryland Maniacs indoor football teams and the 2010 Atlantic 10 Conference Women's Basketball Tournament. It had served as the host of the Colonial Athletic Association Women's Basketball Tournament from 2011 to 2016. The arena has two Daktronics message/scoreboards and the floor to ceiling height measures 40 feet. There are three spotlights in the arena and a portable stage. The arena also contains two backstage ramps and two permanent concession stands plus a full-service bar. The arena also features ten handicapped-accessible restrooms and five private suites. There are three meeting rooms measuring a total of 7,000 square feet (700 m2). Seating capacities are 3,000 for rodeos and horse shows, 5,500 for hockey and basketball, 5,200 for boxing and wrestling and up to 4,700 for concerts. A clock tower is located near the main entrance. There are 2,500 parking spaces at the complex with another 3,000 within walking distance. In 2014, the building received significant upgrades to both the building and equipment used for hosting equestrian events.In October 2022, it hosted the Washington International Horse Show. It was the first time in more than 20 years the WIHS was hosted in Prince George's County.