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

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

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

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

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

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

A larger-than-life statue of America's favorite sundae marks the place it was invented.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

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

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

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

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

A local prank turned town icon.

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

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

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

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

America's first serial killer rests in anonymity.

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

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

The Home and murder site of the witch of Rehmeyers Hollow.

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

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."