Mary Hall: The Madam on the Mall

 Mary Ann Hall ran the largest whorehouse in Washington, DC, during the Civil War.

Where the Potomac Begins

The Fairfax Stone near Thomas, West Virginia

The Pigeon Monument

A Monument to the Passenger Pigeon near Hanover, Pennsylvania

L'Hermitage

French Caribbean Slavery in Maryland

 The Best Family Farm, Monocacy National Battlefield near Frederick, Maryland