Streetcars in Washington, D.C. and Maryland Streetcars in Washington, D.C. and Maryland Streetcars and interurbans operated in the Maryland suburbs of Washington, D.C., between 1890 and 1962. Lines in Maryland were established as separate legal entities, but eventually they were all owned or leased by DC Transit (see Streetcars in Washington, D.C.). Unlike the Virginia lines, the Washington and Maryland lines were scheduled as a single system. Most of the streetcars were built with grand plans in mind, but none succeeded financially. A combination of the rise of the automobile, various economic downturns and bustitution eventually spelled the end of streetcars in southern Maryland. The Rock
Harmony Hall (Fort Washington, Maryland) stage plays, art exhibits, arts classes, scout meetings, and other cultural programs. The building was originally an elementary school. Harmony Hall (Fort Washington, Maryland) Harmony Hall, located in Fort Washington, Maryland, is managed by the United States National Park Service as part of the National Capital Parks-East system. It has been a National Park Service site since 1966. Harmony Hall is a -story Georgian country house built of red brick during the eighteenth century. It is surrounded by of land on Broad Creek, a Potomac River tributary. The house was built circa 1769 by Enoch Magruder. After his death, the