Once named the “world’s oldest gas station” due to its unusual construction material.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

The remnants of a 1970 plane crash remain high in the Rocky Mountains.

The temporary burial site of the man who shot and killed Jesse James.

Colorado's only active volcano last erupted around 4,000 years ago.

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

No one knows exactly how deep the world’s deepest geothermal hot spring is.

Check out a hidden collection of vintage neon signs.

A short but powerful waterfall resides amid Colorado’s Great Sand Dunes.

A mural of the Virgin of Guadalupe painted on the rock wall by canyon's religious namesake.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

Take a self-guided tour through one of Colorado's most elevated mining districts.

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

A remote sandstone plateau named for a legendary cattle rustler.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

All that remains of this once-booming mining town are the ruins of a saloon.

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

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

A unique arch graces the Dolores River Canyon near the Hanging Flume.

In a dry, neglected cemetery lies the unassuming grave of a soldier vilified in life but celebrated in death.

This enigmatic building features numerous architectural styles.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.