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

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

A motel dedicated to Southwestern nostalgia.

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

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

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

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

Legends surround this jagged rock formation in the New Mexico desert.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Home of the International Space Hall of Fame.

This popular pilgrimage site offers a hole filled with holy healing dirt.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

The remains of a historic ranch house that witnessed the Civil War battle dubbed the “Gettysburg of the West.”

Deadly airliner crash preserved for those willing to climb and pay respects.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

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

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

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

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

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

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.