The Rossborough Inn is a historic building facing Baltimore Avenue/United States Route 1 on the eastern edge of the campus of the University of Maryland at College Park. Construction on the building began in 1798 and was completed in 1803, making it the oldest building on campus and the oldest building in the adjoining town of the City of College Park. It is built in the Federal style. The lower wings were added in 1938, as part of extensive renovations. The Rossborough Inn is listed as a historic site by the Maryland-National Capital Park and Planning Commission.

U.S. Route 1 (US 1) is the easternmost and longest of the major north–south routes of the older 1920s era United States Numbered Highway System, running from Key West, Florida, to Fort Kent, Maine. In the U.S. state of Maryland, it runs 81 miles (130 km) from the Washington, D.C. line to the Pennsylvania state line near the town of Rising Sun.