Clagett House at Cool Spring Manor

Hazelwood is a historic home located outside Upper Marlboro, Prince George's County, Maryland, United States. The home is a large asymmetrical frame dwelling, built in three discrete sections over a long period of time. They are: a low gambrel-roofed section dating from the 18th century, about 1770; a gable-roofed Federal-style dwelling dating from the very early 19th century; and a tall gable-front Italianate-style central section constructed about 1860. The house stands on high ground west of and overlooking the site of historic Queen Anne town on the Patuxent River. Also on the property are several domestic and agricultural outbuildings, and the reputed sites of two cemeteries.According to the Federal Direct Tax of 1798, the original section of the house (now the south section) was a 28-foot-square (8.5 m), framed dwelling with a hip roof. The original owner was Thomas Lancaster. Later, it was the home of his nephew's son, Major Thomas Lancaster Lansdale.Hazelwood was listed on the National Register of Historic Places in 1999.

Queen Anne Bridge is an historic bridge over the Patuxent River near Queen Anne in Prince George's County, Maryland in the United States of America. It is the only surviving example of a Pratt truss bridge with Phoenix sections in the county.Numerous bridges have been built on this site that once served as a main road connecting Anne Arundel County to Prince George's County. The first one was built in 1755 and by 1797 another wood bridge was built by local carpenter Colmor Duvall, only to be destroyed by a flood in June 1804. In 1804, the bridge was immediately rebuilt. The current structure was built about 1890 and was closed after the Anne Arundel span of the bridge collapsed due to an overloaded truck, circa 1960. It remained open for pedestrian use until 2007 and remains standing, though fences now prevent it from even allowing pedestrian use between county park land on both sides of the river.

Queen Anne in Prince George's County, Maryland, United States, is a former port on the Patuxent River. It was delineated as a CDP for the 2010 census, at which time it had a population of 1,280. Per the 2020 census, the population was 1,405.

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.

The James Hamilton House is a historic home located in Bowie, Prince George's County, Maryland, United States. The home was built in the mid-1870s, and is a 2+1⁄2-story gable-roofed frame Late Victorian house with Italianate detail. Outbuildings include a board-and-batten meat house contemporary with the house, a garage constructed in the 1950s, and a large concrete block dairy barn to the east of the house, constructed in the 1960s.The James Hamilton House was listed on the National Register of Historic Places in 1988.

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.

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.

Leeland was a settlement in Prince George's County, Maryland, United States. It was once a stop on the Baltimore and Potomac Railroad.

Mill Branch of the Patuxent River in Prince George's County, Maryland is part of the Upper Patuxent Watershead.There is record of a Reuben Ross owning a water mill on the Patuxent River, possibly near this branch. He died in 1722.

Bowieville is a historic home located near Upper Marlboro in Prince George's County, Maryland, United States. It is an elegant two-part plantation house of the late Federal style, built of brick and covered with stucco. The architectural detail is transitional between the Federal and Greek Revival styles.Bowieville is one of the finest examples of the Federal style in Prince George's County. Features such as its symmetry, elliptical fanlights at the entry and between the parlors, tripartite windows, bowed rear porch, and other Adamesque details exemplify the Federal style. Bowieville reflects the prosperity of the tobacco economy of Prince George's County, as well as the prominence of the Bowie family. Bowieville once held 54 slaves.The Bowie family had extensive landholdings in the county and were important politically. Bowieville was built in 1819-20 by Mary Wooton Bowie, daughter of Robert Bowie, Governor of Maryland, on property she inherited from her father, and is very similar in styling to his home, Mattaponi, which is also of brick covered with stucco.After the death of Mary Bowie in 1825, the plantation was entangled in legal issues until the house was sold in 1846 to William J. Berry, one of the county's wealthiest planters.Bowieville was listed on the National Register of Historic Places in 1973.

St. Barnabas Church, also known as St. Barnabas' Episcopal Church, Leeland, was built in Leeland, Maryland, and was established in 1704 as the parish church of Queen Anne Parish which had been established that same year. Because of its location in one of the richest tobacco-producing regions in Colonial Maryland, the small church has been a cultural hub for southern Maryland from early colonial times, through the American Revolution, Civil War, and Reconstruction. The church holds some highly significant art and was the scene of a fiery anti-revolutionary showdown that was close to erupting in violence.The church is located in the Brock Hall census-designated place in unincorporated Prince George's County, Maryland, and it has an Upper Marlboro postal address. Prior to the 2010 U.S. Census the U.S. Census Bureau defined it as being in Greater Upper Marlboro.

Compton Bassett is a historic home in Upper Marlboro, Prince George's County, Maryland, United States, that was constructed ca. 1783. It is a two-story brick Georgian house, covered with cream-colored stucco, on a high basement of gray stucco. A two-story wing was added in 1928. Remaining outbuildings include a chapel to the southeast, a meat-house to the southwest, and a dairy to the northwest. Also on the property is a family burial ground.The Hill family and descendants lived at the premise from 1699 to 1900. Hills Bridge (700 meters to the southeast) has carried traffic over the Patuxent River here since a toll bridge was first constructed in 1852 by W.B. Hill. Compton Bassett was listed on the National Register of Historic Places in 1983. In July 2010 the house and grounds were acquired by the Maryland-National Capital Park and Planning Commission. In an effort to slow-down the effects of time, in 2018 the house underwent a significant structural stabilization. MNCCPC engaged the nationally recognized restoration firm The Durable Restoration Company, working with a local firm to design and build the structural framework system to reinforce the external and internal portions of the house.