Whimsical artist house in the New Jersey woods.

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

Mysterious rocks that ring musically when struck.

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

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

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

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

The final resting place of the Hollywood star who came to a tragic end.

An ideal wedding spot that is almost too ideal.

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

This park contains a number of standing stones meant to heal and inspire.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

No one knows who painted this mysterious mural in a Penn State basement.