United States National Register of Historic Places

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Maryland - Area of significance: Invention

B & O Railroad Potomac River Crossing
College Park Airport
Hopewell
Nassawango Iron Furnace Site
Naval Ordnance Laboratory
Oella Historic District
Poole and Hunt Company Buildings
Sandy Spring Friends Meetinghouse
Taylor, David W., Model Basin
Trevanion
Washington, George, House


Data from United States Park Service and Wikidata