Built in 1768 as the home of Quaker abolitionists, Philadelphia's one and only preserved Underground Railroad site open to the public, and is a National Historic Landmark. This Georgian Style Germantown street house served as a link in the loose and illegal chain of places where former slaves might make their way to freedom. After its rumored role became documented in the late 20th century (resulting in a National Historic Landmark designation) the site's interpretation morphed past its role in the Revolution. Today, the Johnson House Historic Site is a living illustration of the urban side of the nation's Underground Railroad story -- a place where new audiences encounter a powerful fascination with long-whispered stories.