This naturally-sourced hot spring is now home to a clothing-optional resort.

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

Although now a decaying ruin, this stone cabin's history includes several notable figures.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

Outsider Art Community.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

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

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

This curiosity shop contains a museum filled with bizarre, unique objects.

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

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

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

A blacklight journey through a celestial art exhibit.

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

Odd outsider art installations surround a Gold Rush-era ghost town.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

A picture-perfect town, perfect for blowing up.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.