The remnants of the base where US Army troops learned how to fight in extreme conditions.

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

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

This massive home was constructed by one of the greatest conservationists in Colorado history.

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

This nearly abandoned town was once a thriving mining community until a series of fires.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

A hotel with a rich Wild West history of miners and bootleggers.

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

Toss a Frisbee through the ruins of this Colorado gold mining town.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

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

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

Even in death, he's still your huckleberry.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

A downtown park built on top of unclaimed graves.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

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

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

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.

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.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.