Bizarre Cavern.

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

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

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

Mysterious rocks that ring musically when struck.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A park full of outsider art, created by college students studying outsider art.

One of the first commercially successful anthracite-powered iron-making operations in North America.

A smaller model of the Da Vinci sculpture that took 500 years to come to life.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

In which a local geological marvel becomes a quaint roadside attraction.

An outlandish shoe shaped house built by an eccentric millionaire.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

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

This massive sycamore tree has been labeled as one of the largest in the state.

A local prank turned town icon.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

An eponymous directional signpost erected by the first president of the United States.

Outsider art meets paleontology at this roadside reptile repository.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

One of the last active volcanoes on the Eastern seaboard.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.