A quirky collection of outsider art made from automobile parts.

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

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Journey through a collection of over 35,000 Halloween items from all generations.

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

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

Locals call this magical moss-covered walkway the "Emerald Path."

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

A local prank turned town icon.

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

Pennsylvania's own Roswell-style UFO mystery.

This secluded walking trail is a hidden gem of a Pittsburgh park.

It would take 35 firetrucks to fill this enormous glacial pothole.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

America's first serial killer rests in anonymity.

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

This public space is speckled with the eerie remnants of a defunct amusement park.

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

The abandoned coal loading dock is a canvas for unsanctioned art.

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

The first American department store, and home to the largest operating musical instrument in the world.