This large midwestern cavern features impressive rock formations and an underground waterfall.

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

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Miniature art that tells an enormous story.

The Magical World of George Phar Legler.

An homage to everyone's favorite prehistoric cartoon family.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

Ancient pueblos built into the base of a natural canyon wall.

A self-built castle made by a mysterious man.

Outsider Art Community.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

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

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