Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A wealth of pop culture statuary and green chile dishes give this roadside restaurant clout.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

The final resting place of the living embodiment of the famous Forest Service symbol.

This is one really big nut.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A multi-storied adobe complex has been inhabited for more than a thousand years.

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

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The first declared National Monument in the United States.

The only road through the heart of Glacier National Park.

Spectacular views await visitors to this lake.

Home to the deepest rift anywhere on Earth.

Boise State's stadium was the first non-green football field in the world.

Jail from the 19th century that was built by inmates.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

A historic presidential getaway on the continental United States' southernmost island.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.