Historic, 19th-century wagon wheel ruts cut into soft volcanic ash.

A short tunnel built straight through a magmatic dike.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Soak in the life’s work of one of the country’s foremost modern artists.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

Unlike most arches, this geological oddity formed in a volcanic dike.

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

Once owned by the largest employer in Colorado, these ovens have been abandoned for over a century.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

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

A boulder so big and tough, they had to turn it into a landmark.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

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

This 28-foot-tall milk can contains one of the most whimsical ice cream parlors in town.

Drift through decades of high desert music history at this funky hometown museum.

This stunning, technicolor array of geysers has occupied Ferril lake since 1908.

Hike to the decaying remains of a dream house with a spectacular view.

One of three remaining theatres in the United States created in the Art Deco Mayan Revival style.

One of the oldest continuously operating amusement parks in the U.S. is an open-air museum of Art Deco and neon lights.

One of the oldest art supply stores in the United States.

Winter and summer solstice aligned sculpture in the middle of nowhere.

The warmth and creative kitsch of a quilt engulf every patron who visits.

This open-air reconstruction of an Old West town, a cross between a theme park and a museum, provides an immersive historical experience.