Fort Ethan Allen (Arlington, Virginia)

Pimmit Run is a 7.8-mile-long (12.6 km) stream in northern Virginia that runs from Fairfax County to the Potomac River at Chain Bridge in the Arlingwood neighborhood of Arlington.

The Marden House is a residence in McLean, Virginia designed by American architect Frank Lloyd Wright. It is located just off Chain Bridge Road and overlooks the Potomac River. Also known as "Fontinalis," it is named after Luis Marden (1913–2003), a writer, photographer, and explorer for National Geographic. It was designed by Wright in 1952 and was completed in 1959 at a cost of $76,000. The spot had caught Marden's eye in 1944 when he and his wife and had been fishing along the Potomac. After purchasing a plot of land, Marden continued the correspondence he had maintained with Wright since 1940, asking the architect to design a home for him. It was not until 1952 that the designs finally came. After Marden moved to a nursing home in 1998, the house was purchased by Jim Kimsey, co-founder of AOL, in 2000 for $2.5 million.

The Chain Bridge is a viaduct which crosses the Potomac River at Little Falls in Washington, D.C. The steel girder bridge carries close to 22,000 cars a day. It connects Washington with affluent sections of Arlington and Fairfax counties in Virginia. On the Washington side, the bridge connects with Canal Road. Left turns onto the Clara Barton Parkway from the Chain Bridge are prohibited, but the reverse is permitted. On the Virginia side, the bridge connects with State Route 123 (Chain Bridge Road), which provides access to the George Washington Memorial Parkway. The Chain Bridge has three lanes (of which the center is reversible) and can be safely accessed by pedestrians and cyclists. The pedestrian sidewalk provides access to the Chesapeake and Ohio Canal towpath via a ramp. The bridge also carries water mains which provides Arlington County with water from the Washington Aqueduct.

Fort Marcy was a Union fortification protecting Washington, D.C. during the American Civil War. Its remains are now administered by the National Park Service as part of the George Washington Memorial Parkway in Fairfax County, Virginia.

Gulf Branch is a stream in Arlington County, Virginia. From its source southwest of the Gulf Branch Nature Center, Gulf Branch flows on a northeastern course and empties into the Potomac River within the Federal parklands of the George Washington Memorial Parkway. Gulf Branch is surrounded predominantly by forests.

Little Falls Branch, a 3.8-mile-long (6.1 km) tributary stream of the Potomac River, is located in Montgomery County, Maryland. In the 19th century, the stream was also called Powder Mill Branch. It drains portions of Bethesda, Somerset, Friendship Heights, and Washington, D.C., flows under the Chesapeake and Ohio Canal (C&O), and empties into the Potomac at Little Falls rapids, which marks the upper end of the tidal Potomac.

Potomac Heights is a neighborhood in Northwest Washington, D.C., overlooking the Potomac River from MacArthur Boulevard westward. Potomac Heights is the part of the Palisades bounded to the north by Loughboro Road and to the south by Chain Bridge and Arizona Avenue NW. It is part of Advisory Neighborhood Commission 3D in Ward 3, the far northwest corner of the Northwest Quadrant just north of Georgetown.In June 1909, the Potomac Heights Land Co. (based in N.C.) acquired 75 acres (300,000 m2) previously known as the Athletic Park tract at the reported cost of $1000 an acre. The tract extends parallel with and between Conduit Road and the Potomac. It is divided by the Washington Railway and Electric Company and ran from Georgetown to Glen Echo for a 5 cent fare. There were 800 lots at $450–$500 per lot and no home was to be erected at less than $,2500. Sights in the area include Chesapeake & Ohio Canal National Historic Park, Andrew S. Edwards Island, and Chain Bridge.

Merrywood is a historic home located in McLean, Virginia on the Palisades overlooking the Potomac River that has hosted several presidents and members of the British royal family. The Georgian Revival style brick dwelling was built in 1919 for Newbold Noyes.

The Washington Aqueduct is an aqueduct that provides the public water supply system serving Washington, D.C., and parts of its suburbs, using water from the Potomac River. One of the first major aqueduct projects in the United States, the aqueduct was commissioned by the U.S. Congress in 1852, and construction began in 1853 under the supervision of Montgomery C. Meigs and the U.S. Army Corps of Engineers. Portions of the aqueduct went online on January 3, 1859, and the full pipeline began operating in 1864.: 68 The system is owned and operated by the U.S. Army Corps of Engineers and has been in continuous use ever since. It is listed as a National Historic Landmark and the Union Arch Bridge, where it is listed as a Historic Civil Engineering Landmark.

Birchwood is a log house reconstructed in 1936 using logs from an earlier structure built in about 1836. It is located in Arlington County, Virginia. The first log house on the site was an even earlier structure built by Caleb Birch in approximately 1810 that burned down.Richard Wallace, valet to Rear Admiral Presley M. Rixey, lived here, and received President Theodore Roosevelt as a visitor.The house is recognized by Arlington County as a historic site and has installed a historic marker at the house.

Mount Olivet United Methodist Church is a Methodist church located in Arlington County, Virginia and occupies the oldest church site in continuous use in the county. The church and its cemetery are located at the southwest corner of Glebe Road and 16th Street North.

Sibley Memorial Hospital is a non-profit hospital located in The Palisades neighborhood of Washington, D.C. It is fully accredited by the Joint Commission on Accreditation of Healthcare Organizations, and is licensed by the District of Columbia Department of Health and Human Services. The hospital specializes in surgery, orthopedics, and oncology services. It has been part of Johns Hopkins Medicine since 2010.