Priest Neal's Mass House and Mill Site

The Churchville Test Area is a United States Army facility of the Aberdeen Proving Ground, located northeast of Bel Air, Maryland (in Harford County, Maryland, U.S.). The Churchville Test Area (39.596°N 76.253°W / 39.596; -76.253) is a hilly set of cross-country road test tracks providing a variety of steep natural grades and tight turns designed to stress engines, drivetrains and suspension systems for Army vehicles, such as the M1 Abrams tanks, M2 Bradley fighting vehicle and the Humvee. The Test Area consists of 11 miles (18 km) of interconnected roads and test courses located on 250 acres (1.0 km2), with both 3-and-4-mile (4.8 and 6.4 km) closed loop courses, mud, dust and gravel surfaces, and grades ranging from 7% to 29%. On March 21, 2007, the Army celebrated the designation of a 163.5-acre (0.662 km2) buffer-zone alongside the Churchville Test Area, in conjunction with the Harford County Government, the Harford Land Trust, and the Hopkins family. Part of the US Army's Compatible Use Buffer program, under the Pentagon's environmental protection initiative, this land-use purchase was $1.4M (US).

Palmer State Park is a public recreation area located along Deer Creek two miles southwest of Dublin in Harford County, Maryland. The state park saw its genesis in 1965, when Gerald and Ruth Palmer donated 463 acres for use as a public park. The park's historic industrial sites include remnants of the Husband Flint Mill and Deer Creek Iron Works. The heavily forested area is open to canoeing, fishing, and hiking.

Lower Deer Creek Valley Historic District is a national historic district near Darlington, Harford County, Maryland, United States. It comprises approximately 15,020 acres (60.8 km2) in north central Harford County. The primary building material is stone taken from local quarries and used to construct houses, mills, schoolhouses, and churches. Also constructed of stone are many dependencies including springhouses, stables, tenant houses, meathouses, ice houses, and barns. The district's contributing standing structures date from the mid 18th century to the 1940s, and mostly built in vernacular styles. The valley contains approximately 350 separate historic properties.It was added to the National Register of Historic Places in 1993.

Medical Hall Historic District is a historic home and national historic district near Churchville, Harford County, Maryland, United States. The home was constructed of stuccoed stone between 1825 and 1840 and is five bays long, two bays wide, and two and a half stories high. The façade features a centrally placed door with sidelights and a rectangular transom subdivided in a radiating pattern. Also on the property is a stone springhouse which 20th century owners have converted into a pumphouse and a stone cottage believed to be a 19th-century tenant house. The property is associated with John Archer (1741–1810), the first man to receive a degree in medicine in America. One of his sons was Congressman, judge of the circuit court, and Chief Justice of Maryland Stevenson Archer (1786–1848).It was added to the National Register of Historic Places in 1973.

Finney Houses Historic District is a national historic district near Churchville, Harford County, Maryland, United States. It stretches along both sides of Glenville Road in central Harford County, Maryland. The district takes in four houses and their outbuildings erected by members of the locally important Finney family between 1821 and 1906.It was added to the National Register of Historic Places in 1989.

Thomas Run Church, also known as Watters Meeting House, is a historic Methodist church located at Bel Air, Harford County, Maryland. It is a one-story, rubble stone, three-bay church with a slate-covered gabled roof. It was among the first structures used by Methodists in colonial America.

Churchville Presbyterian Church is a historic Presbyterian church located at Churchville, Harford County, Maryland. It consists of three harmoniously designed sections: the original one-story, four by three bay, gable-roofed brick building dated to 1820; the three-story, restrained Italianate, brick bell tower added in 1870; and the low, one-story brick church hall and office added in 1950. Located adjacent is a sequestered 4.5-acre (1.8 ha) graveyard with stones dating back to 1819. The community of Churchville, which surrounds the church, grew up around and took its name from the structure.The 1870 addition of an Italianate, brick belltower was designed by architect J. Crawford Nielson of the firm Niernsee and Neilson.It was listed on the National Register of Historic Places in 1986.

Church of the Holy Trinity, or Holy Trinity Episcopal Church, is a historic Episcopal church located at Churchville, Harford County, Maryland. It is a stone structure built in 1878 in the Gothic Revival style. Its front facade features a triple window of stained glass, consisting of three Gothic-arched lancet windows It also features a steep roof, an architectural chancel at the east end, south porch and sacristy, belfry at the west end, and lancet windows and doors with pointed arches.It was listed on the National Register of Historic Places in 2002.

Churchville is an unincorporated community in Harford County, Maryland, United States, situated between the county seat, Bel Air, and Aberdeen, where Aberdeen Proving Ground is located.

Glenville is a populated place located in District 2, Hall's Cross Roads, a minor civil division (MCD) of Harford County in the U.S. state of Maryland.The elevation of Glenville is 190 feet. Glenville appears on the Aberdeen U.S. Geological Survey Map. Harford County is in the Eastern Time Zone.

The Hays-Heighe House is a historic home located on the campus of Harford Community College near Bel Air, Harford County, Maryland, United States. It is a five bay long, two bay deep stone house with a gable roof and massive brick chimneys on each gable, built in 1808. On the east is a five bay long, two-story stone wing. Its initial owner, Thomas A. Hays, was one of the founders of the town of Bel Air.The Hays-Heighe House was listed on the National Register of Historic Places in 1972.

Harford Community College is a public community college in Bel Air, Maryland. It was established as Harford Junior College in September 1957 with 116 students in the buildings and on the campus of the Bel Air High School in the county seat. The Bel Air campus of 1964 occupies 332 acres (1.34 km2) and now has 21 buildings totaling over 287,000 square feet (26,700 m2).