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

A surprising collection of bronze faces beneath a bridge in Loveland.

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

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

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The ruins of this former mining boomtown once housed over 3,000 people. Now, the population is two.

A warm desert spring holds one of the rarest species on earth.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

A ghost town that held steady longer than most, but finally gave up the ghost.

This spectacular track has run continuously since 1882.

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

The fifth-longest natural arch in the world, and the longest outside China.

A crack flared at the base provides a pathway completely through a sandstone ridge near Moab.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.

It's safe—and permitted—to walk across these twin natural sandstone arches.

This Moab institution functions as both a rock store and a small natural history museum.

Colorado's only true geyser is hidden within the San Juan National Forest.

A small oasis not far from downtown Moab.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

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

A house carved into a rock in the 1940s.

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