The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Hollowed out cedar log tubs set in an ancient towering forest.

An abandoned castle owned and ignored by Masons carries a cursed history.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The first declared National Monument in the United States.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Enormous lake at the bottom of a unique cave system.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Eighteen miniature death-scene dioramas.

Towering basalt columns, a creation of fire and ice.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Dramatic river bend surrounds a natural red-rocked pedestal.

Semi-recognized center of the world, with many oddities.

Most-visited and most-photographed slot canyon in the American Southwest.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The world's largest military aircraft cemetery.

Rippling sand dunes frozen in the Arizona rock.