In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

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

This historic stone barn is the former home of legendary cattleman Charles “Lonesome Dove” Goodnight.

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

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

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

A museum of natural history, Edwin Carter's original log cabin home and workshop houses taxidermy specimens.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

You might want to bring a rain jacket to this travertine triple waterfall.

This hot dog-shaped diner has moved all around Colorado, but has never been to New York.

A museum dedicated to the mysterious cryptid.

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.

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

Check out a hidden collection of vintage neon signs.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

This memorial pays homage to Pueblo's four Medal of Honor recipients.

The largest self-built castle in the U.S., six decades in the making.

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

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

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

This sidewalk tribute honors Colorado's great culinary creation.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

A unique auditory experience right on the sidewalk.