This abandoned prison castle has become an imposing gallery of graffiti art.

Massive still life just off the highway in Kansas.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

Celebrate the history of the rich and truly misunderstood relationship between man and pigeon.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

Site of a former hidden treehouse in New Orleans.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Curious cave that stays a cool 56 degrees all year long.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

This graceful little figure is a one-of-a-kind version of the cherished character.

A perilous medieval road leading right into the sea.

A county library in rural Ohio houses one of the finest mineral collections in the world.

The hottest place on the planet.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

A modernist landscape of water and sci-fi concrete.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A Hawaiian stairway to heaven—that you can't climb.

A gargantuan crystal kingdom.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

The atmospheric road was never meant to be so creepy.