The largest self-built castle in the U.S., six decades in the making.

A short tunnel built straight through a magmatic dike.

Once owned by the largest employer in Colorado, these ovens have been abandoned for over a century.

The remnants of a creative early method of wildfire prevention.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A kaleidoscope gallery and steampunk emporium named for a pioneering journalist.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The state bird of New Mexico, constructed entirely out of garbage.

This 47-foot chile pepper sculpture welcomes Scoville heat unit obsessed tourists to the Big Chile Inn.

More than 21,000 images fill this overlooked gem of a prehistoric site.

The entire history of the U.S. Space Shuttle Program is painted on an enormous roadside water tank.

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

This is one really big nut.

A Prada store in the West Texas desert that is never open for business.

This old abandoned sign flickers to announce a motel that isn't even there.

A little stop along the Texas highway where Rock Hudson, Elizabeth Taylor, and James Dean stayed while shooting the 1955 film "Giant."

With print dying, this local paper keeps the lights on by doubling as a stunning cafe and cocktail bar.

Minimalist modern art on a repurposed military base in rural Texas.

Not everything is bigger in Texas.

Mysterious glowing orbs float through the desert night.

The second largest roadrunner in the world stands 11 feet tall in his West Texas town.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.