A soon-to-be-forgotten roadside spectacle loaded with local lore.

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.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

The residents of this ominous-sounding street in Pennsylvania liked its name so much they fought to keep it.

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

The first of Lancaster's "rural cemeteries."

This colonial mansion has been home to a staggering number of American historic figures.

The graffitied ruins stand hidden within the Pennsylvania woods.

Where the oil industry began.

A museum of anything and everything Stooge.

Pittsburgh's literal underground railroad.

A small museum along the Susquehanna River is home to a rich collection of Native American artifacts.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

An ideal wedding spot that is almost too ideal.

According to local myth this cemetery is half evil spirits, half good—split down the middle.

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

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The last street in Pittsburgh that's paved with wood.

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.

The ruined remains of a coal mining ghost town are hidden within the woods.