The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

The site of America's first commercial oil well essentially disappeared after the town went bust.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

A giant ball made from pieces of an old Jeep.

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.

Memorializing an American tragedy of massive proportions.

A museum of anything and everything Stooge.

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

Could it have picked a better place to land?

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

One of the oldest of its kind.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

This dramatic rail curve was once the target of a failed Nazi attack.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

Steepest flood safety railway in the entire world.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

This jail which was in service for over a century is now open for curious visitors.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

This elaborate towering structure was once famed for its revolutionary height.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.