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

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

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

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

A unique geological area spiked with wind-carved rocks that resemble teepees.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

This abandoned bootleg attraction was built to cash in on the popularity of classic TV show, F Troop.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Step into the cool deep past and unknown future of who begat who.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The highest bridge in America was built for an almost unnervingly small amount of money.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

When ecosystems collide in the arid Southwest.

A motel dedicated to Southwestern nostalgia.

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

See massive fossils that are over 200 million years old in northeastern Arizona.

A museum dedicated to the alleged Roswell Incident.

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

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

Seller of surplus nuclear research materials.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Former villa and estate of James Deering developed to preserve native tropical forests.