Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

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

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

A bizarre roadside attraction and the first instance of miniature golf in the world.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

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

These eerie outliers of the lightning bug family glow a mysterious blue color.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

All that's left of the quintessential "cabin in the woods."

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A lush green oasis in the middle of Chicago.

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

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

An unassuming secret door once led to a legendary watering hole.

Seattle's own bad art museum located inside Cafe Racer.

An essential stop before plundering, BYO Cutlass.

This charmingly homemade amusement park has been growing for 40 years.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

The ghost town that ended up on Ebay.

A picture-perfect town, perfect for blowing up.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This woodland architectural installation acts as a camera obscura for the heavens.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.