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

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

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

A renovated hotel is bringing new life to a nearly-abandoned mining town in Colorado.

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

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

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

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

This enigmatic building features numerous architectural styles.

It takes a nine-mile hike to reach these hot springs, but weary hikers are rewarded with stunning views and a warm soak.

The world's largest washing machine collection has more than 1,400 antique items in its exhibit.

Hidden high on a remote mountain peak is a humbling and mysterious Vietnam War memorial.

Take a dip in the world's largest mineral hot springs pool.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.

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

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

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.

A coal fire has been burning underground here since 1896.

A fake mine that was made using real mining techniques which is also used as a community center.

A multiversal transit station located right below a highway interchange.

According to local legend, a tree grew from the stake that killed this alleged vampire. In reality, he probably died from influenza.

A home covered with elaborate mosaic and other pieces of art.