Maps: May 2018 Archives
A nomination form for the National Register of Historic Places contains a wealth of historical detail, not only about the site and the building, but often about the people, events, and times that give it significance. If you're researching local history, NRHP forms are a great resource. Maryland offers a well-organized example: You can browse NRHP sites by county, look at National Register Districts and National Historic Landmarks, and research topics like lighthouses and Civil War Sites.