The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

Pittsburgh's literal underground railroad.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

Hundreds of protractors affixed to surfaces all over the city.

One of the oldest of its kind.

Steepest flood safety railway in the entire world.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

This little museum in the town where zombies were born celebrates the living dead.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.