When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

Above Breckenridge, a destructive mining technique sits sunken in a small pond.

A memorial dedicated to the victims of the Columbine High School shootings.

The start of the group that straightened the teeth of a nation.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

One of the few surviving Panama Canal steam shovels stands outside a tiny Colorado mining museum.

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

The home of a formerly enslaved man who went on to become a prospector, entrepreneur, and activist for Black rights.

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

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

Neal Cassady may still have an open tab at one of Denver's oldest watering holes.

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

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

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

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

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

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

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

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This museum offers an actual time machine back through Colorado's past.

A downtown park built on top of unclaimed graves.

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.