The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

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

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

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

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

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

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

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

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

This spectacular track has run continuously since 1882.

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