Oakwood, Maryland

Conowingo Creek is a 20.2-mile-long (32.5 km) tributary of the Susquehanna River in Lancaster County, Pennsylvania, and Cecil County, Maryland. The name of the creek comes from the Lenape, meaning "at the rapids".It originates near the northern border of East Drumore Township and flows south, meeting Jackson Run near the southern border. It enters Fulton Township just above the birthplace of Robert Fulton, for whom the township is named. Flowing along the east side of Wakefield, it meets Little Conowingo Creek below the town, and begins to flow through hillier terrain before entering Maryland. Its valley soon deepens into a gorge as it approaches the Susquehanna. It empties into the Conowingo Reservoir at Pilot Station.

The Joshua Lowe House is a historic home located at Rising Sun, Cecil County, Maryland, United States. It is a two-story, center passage plan brick building three bays wide by two bays deep, built about 1830 in the late Federal. The house is one of the earliest and most substantial buildings in the crossroads village of Rock Springs and served as the first post office for the community from 1830 to 1838.The Joshua Lowe House was listed on the National Register of Historic Places in 2001.

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.

The Rock Springs Generation Facility is a 684 MW natural gas-fired electric generating peaking plant located in Rising Sun, Maryland. The plant comprises four gas turbines and went online in 2003. The plant was originally co-owned by Old Dominion Electric Cooperative and Consolidated Edison, and was sold to AllCapital and Industry Funds Management in 2007. The Carlyle Group, an asset management company, acquired the plant in 2016.

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

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.

Octorara Farm is a historic home located at Conowingo, Cecil County, Maryland, United States. It was built in sections dating from the period between 1775 and 1840. The main block is a 2+1⁄2-story brick structure of high style Greek Revival architecture; it was probably added to the earlier rear section around 1830–1840. The present kitchen, which constitutes the central room of the three rooms of the rear section, is the earliest section of the house, probably dates to about 1775. Also on the property are a large four-bay fieldstone barn, a wagon shed, dairy, smokehouse, and tenant houses.Octorara Farm was listed on the National Register of Historic Places in 1980.

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.

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

Octoraro Creek is a 22.1-mile-long (35.6 km) tributary of the Susquehanna River, joining it 9 miles (14 km) above the Susquehanna's mouth at Chesapeake Bay. The Octoraro rises as an East and West Branch in Pennsylvania. The East Branch and Octoraro Creek form the southern half of the border between Lancaster and Chester counties until the creek crosses the Mason-Dixon line. It winds through northwestern Cecil County, Maryland before joining the Susquehanna. Each of the branches is less than 20 miles (32 km) long. The entire creek drains 208 square miles (540 km2) of watershed. Octoraro Creek was designated a Pennsylvania Scenic River by Legislative Act 1983-43, managed by the Octoraro Creek Watershed Association. A brick tunnel leading to Octoraro Creek was built by Charles Spotts and used by slaves travelling the Underground Railway through Lancaster County, Pennsylvania.