The remains of an early 1900s dude ranch that operated until the 1970s.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

16,500-acre ranch filled with American heritage, geological wonders, and a giant pile of tires is the crown jewel of an intriguing tug-of-war.

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

A mental health hospital dating back more than 139 years, now features a museum.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Explore some of the most unique vehicles in history along with a cast of unsettling mannequins.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

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

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

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

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

This iconic science fiction house still looks like something from the future.

A collection of over 15,000 zines works to preserve DIY publishing culture.

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

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

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

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

The largest source of fossilized insects anywhere.

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.

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.

Abandoned silver mine strewn with wrecked and twisted structures.

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