A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This giant steer-skull edifice refuses to die.

A reproduction of earth's many biomes.

The world's largest military aircraft cemetery.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

The fading, forgotten remains of a once bright and booming factory.

The Magical World of George Phar Legler.

Mysterious glowing orbs float through the desert night.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

A medieval castle in the middle of rural Texas.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Limestone caves with spectacular showcase chambers.

Hidden on a cattle ranch in Arizona, this bookstore has been celebrating Southwest literature for more than 40 years.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

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

These aggressively sustainable art homes look like something out of 1970's science fiction.

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

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

A clear blue swimming hole with hidden caves, still unexplored.

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