Colorado's only true geyser is hidden within the San Juan National Forest.

The largest source of fossilized insects anywhere.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

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

See six states, pickled freaks, rocks, and antiques.

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

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

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

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

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

When ecosystems collide in the arid Southwest.

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

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

A collection of huge, site-specific sculptures sitting in the Montana woods.

This amazingly preserved Gold Rush town is a historian's dream.

With over 340,000 artifacts and counting, there is something for everyone, often called the "Smithsonian of the West."

"Polynesia on the Plains."

After this former brothel closed, its interior remained almost frozen in time.

New fungal and bacterial species call this deadly lake home.