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

This giant disembodied horse head seems to balance impossibly on its nose.

Where the oil industry began.

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

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

Pittsburgh's literal underground railroad.

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

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

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

An Irish Memorial commemorating those who perished due to potato blight.

One of the oldest of its kind.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

America's first serial killer rests in anonymity.

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

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

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

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

Within this beautiful Pittsburgh cemetery, a unique headstone bears witness to one man's eternal love for Jaws.

A field of nothing but boulders which resembles a giant's gravel driveway.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Current docking place of the SS United States, the fastest transatlantic ocean liner.