Conowingo Creek

Several incarnations of the Conowingo Bridge crossed the Susquehanna River at the original location of Conowingo, Maryland, United States, about two miles upstream of the Conowingo Dam, which replaced it.

Castleton is an unincorporated community in Harford County, Maryland, United States.

Berkley Crossroads Historic District is a historic district in Darlington, Maryland, United States. It is a small rural crossroads community dating from the late 18th century through the early 20th century, and is one of the few remaining rural crossroads in Harford County. The entire area is agricultural in nature, and mostly consists of two- and three-story residences. The earliest structures, dating from the late 18th and early 19th century are of log construction, in whole or in part. It was also an important 19th century Free Black community.It was added to the National Register of Historic Places in 2003.

Rigbie House, also known as "Phillip's Purchase", is a historic home located at Berkley, Harford County, Maryland. It is a 1+1⁄2-story, frame and stone structure built about 1781. It was one of a series of forest outposts fortified against the Indians and representing Lord Baltimore’s claim of 1632 to land extending north to the 40th parallel. In April 1781, it was the place where the Marquis de Lafayette’s officers quelled a mutiny that might have prevented his army of New England troops, who had been headed homeward, from turning south again to join General Greene and General Washington at Yorktown, in which case that battle might never have been fought.Phillip's Purchase was a tract of land inherited by Colonel Nathaniel Rigbie in 1708. He moved to the area, originally consisting of approximately 2,000 acres, in 1730 with his wife Cassandra Coale. They built the Rigbie House in 1732. The land covered much of what is now Berkley, Maryland and Darlington, Maryland. It was listed on the National Register of Historic Places in 1973.

Oakwood (formerly Mount Pleasant and Mexico) is an unincorporated community, in Cecil County, Maryland, United States. It lies at an elevation of 371 feet (113 m).

Berkley is an unincorporated community in Harford County, Maryland, United States. Rigbie House was listed on the National Register of Historic Places in 1973.

Berkley School, also known as Hosanna School, is a historic school for African Americans located in Darlington, Harford County, Maryland. It was built in 1867 and is a rectangular two-story, three-bay frame building which rests on an uncoursed rubble-stone foundation. It is one of four structures erected in Harford County in the years immediately following the Civil War for the purpose of educating freed slaves. The school was officially established with funds provided by the Freedmen's Bureau for construction and teachers salaries. The Harford County School Commissioners took over operation of the School in 1879. It continued to function as a school until 1946 when the school ceased operation. In 1954, Hurricane Hazel destroyed the second story but left the ground floor intact. The second floor was restored in 2005.It was listed on the National Register of Historic Places in 1988.

The Conowingo Dam (also Conowingo Hydroelectric Plant, Conowingo Hydroelectric Station) is a large hydroelectric dam in the lower Susquehanna River near the town of Conowingo, Maryland. The medium-height, masonry gravity dam is one of the largest non-federal hydroelectric dams in the U.S., and the largest dam in the state of Maryland. The dam sits about 9.9 miles (16 km) from the river mouth at the Chesapeake Bay, 5 miles (8 km) south of the Pennsylvania border and 45 miles (72 km) northeast of Baltimore, on the border between Cecil and Harford counties. The dam supports a 9,000-acre reservoir, which today covers the original town of Conowingo. During dam construction, the town was moved to its present location about 1 mile (1.6 km) northeast of the dam's eastern end. The rising water also would have covered Conowingo Bridge, the original U.S. Route 1 crossing, so it was demolished in 1927. U.S. Route 1 now crosses over the top of the dam. The Conowingo Reservoir, and the nearby Susquehanna State Park, provide many recreational opportunities.

Deer Creek Friends Meetinghouse is a historic Friends meeting house located at Darlington, Harford County, Maryland. It is a one-story fieldstone structure, six bays long on the south, four bays on the north, and three bays wide. It was constructed in 1784 to replace a building of 1737 and renovated in 1888. The interior is divided into two spaces by an original paneled partition and the benches are original, with 10 benches in each room and an aisle down the center. The property also includes a five-stall horse shed and a cemetery with burials dating from 1775 to 1930.It was listed on the National Register of Historic Places in 1980.

Gray Gables is a historic home located at Darlington, Harford County, Maryland. It is an 1880s Queen Anne style frame house, featuring an irregular plan, projecting bays, steeply pitched multiple gables, and slate roofs. It is an intact example of the early work of Walter Cope (1860–1902), a principal in one of Philadelphia's most important and prestigious architectural firms, Cope and Stewardson.It was listed on the National Register of Historic Places in 1986.

Conowingo is a community in northwestern Cecil County, Maryland, United States. The community replaced a previous one that was inundated by a reservoir.

Wildfell is a historic home located at Darlington, Harford County, Maryland, United States. It is a two-story, octagonal house of stacked plank construction, featuring an 8-sided roof topped by an octagonal "captains walk," flanked by two brick chimneys. The house has a simplified Federal style. It was built about 1854, and served as summer home for the Jewett family until 1874. Wildfell is one of the rare octagonal houses built in Maryland at the height of the "Octagon Fad". Located in Darlington, Maryland just off US 1, the house is a prominent feature of Harford County.Construction is believed to have begun in 1847 with completion prior to 1854. Commissioned by the Joseph Jewett family of Baltimore, Maryland and built by William Hensel. The Jewett family learned of an abandoned Baltimore clipper ship which had served in the War of 1812. The Jewett family purchased the derelict and contracted Hensel (a former naval carpenter) to salvage wood from the vessel and transport materials to the building site in Darlington, MD. The short oak timbers and naval treated planks were well suited to the short walls required by the octagonal design. The interior layout resembles an octagon divided into quadrants. Thus, most rooms have 5 walls. Two stories high, the octagonal house has an 8-sided roof topped by an octagonal "widows walk" flanked by two brick chimneys which serviced 4 fireplaces in the primary living areas and a hearth in the basement. The house faces southeast, with one or two openings in each wall. A modern one-story wing (constructed 2011, replaced ca.1900 structure) runs northwest. There is a three-sided porch facing east, southeast, and south. Wildfell is a simplified Federal style, with a molding over the boxed eaves, which is repeated on the porch above its octagonal pillars. The six-paneled front door in a plain frame is topped by a four-light transom. Windows have 6/6 lights behind louvered shutters. The stairway has two turned balusters on each step under a walnut handrail. Double parlors are separated by pocket doors. Original kitchen and dining room spaces are to the rear. Perhaps unique to this house are the exterior and interior load bearing walls whose construction is of narrow (1”x7”) oak planks laid horizontally, nailed from above as the work proceeded, forming a virtually solid 7” wall thickness. The construction method is visible beneath the shutters of the false windows to the left of the front door. The window placement would have opened out from the side of the staircase, but is placed to complete the symmetrical appearance of the house. Floor joists are hand hued timber beams set in a cross pattern and cross joined by lesser beams. The Jewetts used Wildfell as a summer home from March 1854 until June 1874. The property was sold in 1874 and it came into ownership by the prominent Scott family where it remained for several generations. Wildfell is listed on the National Register of Historic Places September 20, 1973.The property is currently owned by Matthew and Bonnie Payne.