Intricate storybook scenes are tucked inside these shadow boxes, which are tucked inside a library in the Pocono Mountains.

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

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

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

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

Pittsburgh's literal underground railroad.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

The graffitied ruins stand hidden within the Pennsylvania woods.

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

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

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.

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

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

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

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

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

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

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

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.