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

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

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

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

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

A museum dedicated to the alleged Roswell Incident.

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

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

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

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

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

Archaeologists believe this panel of petroglyphs depicting descending sheep and other figures in Glen Canyon are 3,000 to 6,000 years old.

With more than 2,000 pieces, this is world's largest collection of artwork inspired by Leonardo da Vinci's 'The Last Supper.'

The "Father of Arizona" tried to build a Zoroastrian fire temple on the hill where he's now buried.

The first Protestant church in Arizona and only Gothic Revival style adobe church in the world.

A historic jail preserves etchings from over a century of incarcerated people in a town with a rough and tumble past.

Once disputed as the largest sundial in the world.

The former home of the army detachment that captured Geronimo.

An early 20th-century jail not far from the infamous Tombstone, Arizona.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

This hidden gem in Arizona is truly worth the rugged journey.