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

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

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

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

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

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

All that remains of this abandoned coal town is a beautiful, haunting cemetery.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

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

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