Monocacy Aqueduct

The Monocacy River () is a free-flowing left tributary to the Potomac River, which empties into the Atlantic Ocean via the Chesapeake Bay. The river is 58.5 miles (94.1 km) long, with a drainage area of about 970 square miles (2,500 km2). It is the largest Maryland tributary to the Potomac. The name "Monocacy" comes from the Shawnee name for the river Monnockkesey, which translates to "river with many bends." (However, another local tradition asserts that "Monocacy" means "well-fenced garden" in an Indian language.) The Monocacy National Battlefield lies alongside part of the river, marking an 1864 engagement during the American Civil War, the Battle of Monocacy Junction. The Chesapeake and Ohio Canal crosses over the river at the Monocacy Aqueduct, the largest of the 11 aqueducts on the canal.

The Little Monocacy River is a 10.1-mile-long (16.3 km) tributary stream of the Potomac River. Despite its name, the stream does not feed into the Monocacy River. The Little Monocacy is located almost entirely in Montgomery County, Maryland, and enters the Potomac just downstream from where the Monocacy enters the Potomac. Its headwaters rise southwest of Comus, and most of its approximately 17-square-mile (44 km2) watershed is farmland and pasture (60.56%) or forested land (36.03%).

Clapham's Ferry, also known as Spinks Ferry, Lost Corner Farm, and Riverside, is a historic home located near Leesburg, Loudoun County, Virginia. It consists of a 2+1⁄2-story, three bay, Federal style main block of red sandstone, with a two-story sandstone kitchen addition built about 1849. It has a standing seam metal gable roof. Also on the property are the contributing log kitchen building, meat house, bank barn, corn crib, and tenant house. The property is also historically significant as the site of an early ferry crossing connecting Loudoun County, Virginia, with Maryland.It was listed on the National Register of Historic Places in 1997.

The Dickerson Generating Station is an 853 MW electric generating plant owned by NRG Energy, located approximately two miles west of Dickerson, Maryland, on the eastern banks of the Potomac River.

The Dickerson Whitewater Course, on the Potomac River near Dickerson, Maryland, was built for use by canoe and kayak paddlers training for the 1992 Olympic Games in Spain. It was the first pump-powered artificial whitewater course built in North America, and is still the only one anywhere with heated water. It remains an active training center for whitewater slalom racing, swiftwater rescue training, and other whitewater activities. The facility is owned by the NRG Energy company. Except during special events, access requires membership in the Potomac Whitewater Racing Center, a USA Canoe/Kayak National Training Center.The course was constructed in 1991, inside a pre-existing straight, 900-foot (270 m)-long concrete channel, 40 feet (12 m) wide. Since 1959, the channel has returned cooling water from the Dickerson Generating Station to the Potomac River, 41 miles (66 km) upstream from Washington, D.C. Water is pumped from the river, warmed as much as 35 °F (20 °C) as it cools the power plant's three coal-fired generators, and then emptied into the channel for gravity flow back to the river. (The plant has three other generators which use a different cooling system.) Streamflow through the course is 200 cu ft/s (5.7 m3/s) to 600 cu ft/s (17 m3/s), depending on the operation of the plant's three coal-fired generators and their six cooling water pumps. In the summer months, when water temperature in the channel exceeds 100 °F (38 °C), the course is closed for health reasons. It is also closed when the Potomac River rises above 5 feet (1.5 m) on the Little Falls gauge 20,000 cu ft/s (570 m3/s), flooding the lower section of the course.

Dickerson is an unincorporated community in Montgomery County, Maryland. It is on Maryland Route 28, between Sugarloaf Mountain and the Potomac River. It is a community near the town of Poolesville, Maryland. Dickerson is 61.5 square miles (159 km2).

Dickerson is a passenger rail station on the MARC Brunswick Line between Washington, D.C., and Martinsburg, WV (with an extension to Frederick, MD). This station was designed by E. Francis Baldwin and built by the Baltimore and Ohio Railroad in 1891. It is the last station Frederick bound trains pass before branching onto the Frederick Branch.

Tuscarora Creek is a 12.8-mile-long (20.6 km) tributary of the Potomac River in Frederick County, Maryland, in the United States. The creek rises east of the community of Jefferson, about 6.4 miles (10.3 km) southwest of the city of Frederick, and flows south to its mouth at the Potomac.

White's Ford was an important ford over the Potomac River during the American Civil War. It was used in many major actions, including the crossing into Maryland of the Confederate army prior to the Maryland Campaign and Confederate Major General J.E.B. Stuart's ride around Union Major General George B. McClellan on October 10, 1862, when he used the ford to cross into Loudoun County, Virginia. It is located a few miles above present-day White's Ferry. The ford was named after Captain Elijah V. White, a Confederate cavalry officer and leader of the cavalry battalion known as the Comanches. His farm was on the Virginia side of the ford.

Nolands Ferry I Archeological Site is an archaeological site near the historic Noland's Ferry boat landing at mile 44.58 on the C&O Canal and Tuscarora. The Archeological Site is a prehistoric occupation site located in the Monocacy region of southern Frederick County, Maryland. Diagnostic artifacts at the site indicate that the site was almost continuously inhabited from the Paleo-Indian period to the early 19th century, with the most substantial inhabitation occurring during the Late Woodland period.The site was listed on the National Register of Historic Places in 1985. Noland's Ferry, for which the site is named, has a broad history from the mid-1700s, with some of America's founding leaders among its customers.

Saleaudo is a historic home located at Adamstown, Frederick County, Maryland, United States. It is a two-story brick house built about 1856, with four interior brick chimneys. The house features murals painted by Constantino Brumidi and Filip Castaggini in the entrance hall.Saleaudo was listed on the National Register of Historic Places in 1979.

The Darby Store, also known as the Darby Store Cultural Park is a historic site located on Medley's Hill at 19801 Darnestown Road in Beallsville, Maryland that is part of the Beallsville Historic District. What is now the intersection of Beallsville Road and Darnestown Road/(Route 28) was formerly the Brewer Farm. In 1908, H.C. Darby bought the land. In 1910, H.C. Darby built a two-story general store. In the 19th and 20th century it was very common to have the family residence next to the family business, and the Darby House was built in 1921.In 2004, the Maryland-National Capital Park and Planning Commission purchased the property and restoration by BELL Architects was ongoing through 2015. The general store is culturally and historically significant as one of the few remaining examples of rural vernacular architecture of the early 20th century in Montgomery County. During the summer of 2009, the site was under excavation. A team of archaeologists spent three weeks at the site and their findings included: oyster shells, glass shards, coal, nails, ceramic pipe stems, a 1918 liberty dime, and a Yoo-hoo bottle, all of which provide clues to the history of the area, and the buildings occupying it since the 19th century.