D. H. Springhouse

Deer Creek is a 52.9-mile-long (85.1 km) river in Maryland and Pennsylvania that flows through the scenic areas of Harford County and empties into the Susquehanna River, roughly halfway between the Interstate 95 bridge and Conowingo Dam. Its watershed area is 171 square miles (440 km2). Its watershed area in MD (excluding water) is 145 square miles (380 km2), with 3% impervious surface in 1994. It serves as a divider between the agricultural and urban/suburban areas of Harford County.

Kalmia is an unincorporated community in Harford County, Maryland, United States. The Husband Flint Mill Site was listed on the National Register of Historic Places in 1975.

The Scarboro Landfill is a controversial landfill in Harford County, Maryland in the United States. It is located on the property of the Harford Waste Disposal Center operated by the Harford County Government where a separate sanitary landfill is in use. An assessment of the landfills was carried out and confirmed the concerns raised by local residents. The now closed Scarboro Landfill is unlined, and it received municipal waste from 1956 until 1986. In the 1980s a number of wells had been drilled in the areas surrounding the landfill and were discovered to contain pollutants such as methylene chloride, toluene, ethylbenzene and other xylenes. A remediation program is being carried out and there is a recognised problem with volatile organic compounds.The Scarboro Conservation Area is nearby.

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.

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.

The Mill Green Historic District is a National Register of Historic Places listed community located in Harford County, Maryland. The district consists of a small cluster of privately owned historic homes and buildings including a historic mill. The district is located at the junction of Mill Green Road and Prospect Road. Broad Creek flows through the district. The historic district designation was established in 1993.

Dublin is an unincorporated community in Harford County, Maryland, United States. Dublin was founded in the early 19th century by George McCausland and a friend who migrated from Dublin, Ireland.

Hickory is an unincorporated community in Harford County, Maryland, United States. Hickory is located at the junction of Maryland Route 543 and U.S. Route 1 Business 3 miles (4.8 km) north of Bel Air.

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.

St. Ignatius Church is a historic Roman Catholic Church located at Forest Hill, Harford County, Maryland. It is a rubble stone, one-story rectangular structure of five bays, with a tall tower at the west end and a rubble stone two-story rectangular addition. The original 35 feet by 50 feet church was built between 1786 and 1792. A major addition was made in 1848 and the tower was added in 1865. The parish hall wing was constructed in 1822 and a small frame sacristy was added in 1887. It is the oldest extant church in the Archdiocese of Baltimore.It was listed on the National Register of Historic Places in 1974.