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

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

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Opulent downtown movie theater now houses cars as an indoor parking garage.

An experimental, automotive replica of Stonehenge.

One man's swirling six-acre monument of stone.

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

Abandoned businesses, homes, and rusted cars are all that remains of this stopover town.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

Just a man taking his prehistoric pet for a stroll.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

In a country where driving from one town to another is literally impossible, this small stretch of gravel is a remarkable feat.

Explore the dark underground corridors of this graffiti-covered former military fortification.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

An abandoned coal mine reached by a steep hike.

The world's largest fully steerable radio telescope.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.