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

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

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

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

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

Oddly shaped rock formation, misassociated with a nearby utopian community.

A river runs through this remote valley in a very unexpected way.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

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

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

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

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

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

Legends surround this jagged rock formation in the New Mexico desert.

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

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A hotel with a rich Wild West history of miners and bootleggers.

This spectacular track has run continuously since 1882.

One of the American Southwest's most extensive collections of Navajo rock art.

The hallowed remains of a 900-year old Ancestral Pueblo great house.