This super steep hike ascends 2,000 feet in less than a mile.

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.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Community owned and operated, this property is home to a diverse set of nudists.

The highest bridge in America was built for an almost unnervingly small amount of money.

Abandoned silver mine strewn with wrecked and twisted structures.

When ecosystems collide in the arid Southwest.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

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

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

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

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

An adorably sweet display of sculpted Precious Moments figurines.

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

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A chessmaster's dream destination.

An abandoned factory along the Mississippi coated by a giant mural.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.