This naturally-sourced hot spring is now home to a clothing-optional resort.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

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

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

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

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.

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

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

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

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

This 19th-century ranch is being transformed into a residential library with thousands of books about the natural world.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

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.

An annual festival celebrating Colorado's most famous frozen corpse.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

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

Central City celebrates its most famous madam by racing beds down Main Street.