Roadside Historical Markers Listing

Subject	City	State
A Blue Comet Observation Car Part of Diner	Clinton	New Jersey
President Garfield was shot here -site of National Gallery of Art	Washington	District of Columbia
Secret spaces inside Ben Franklin Bridge	Philadelphia	Pennsylvania
Perkasie Tunnel - once world's longest railroad tunnel	Perkasie	Pennsylvania
You can't get to heaven, on the Frankford El ...	Philadelphia	Pennsylvania
African American Defied Custom, Attempted to Board Trolley Here	Philadelphia	Pennsylvania
Hidden Tunnel Under Owl's Head Park, Brooklyn	Brooklyn	New York
Never-used subway station below this intersection?	Philadelphia	Pennsylvania