Natural Wonders in Colorado

A short tunnel built straight through a magmatic dike.

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

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

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

The largest source of fossilized insects anywhere.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

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

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.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Community owned and operated, this property is home to a diverse set of nudists.

This naturally-sourced hot spring is now home to a clothing-optional resort.