This Colorado fire station has been in continuous operation for more than a century.

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

"All Mountains - All The Time."

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

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

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

This enigmatic building features numerous architectural styles.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

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

One of few remaining antique carousels with stationary animals in the U.S.

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

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

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

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

A prehistoric rock shelter that's literally in someone's backyard.

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

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

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

A lively annual event in which thousands of people race to push coffins heavy with bodies up a hill.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

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

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