17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

For those going through a life transition, a place to leave behind a piece of your former self.

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

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

The first permanent memorial to a unique secret weapon of World War II.

The biggest solar telescope in the world helps reveal the secrets of our sun.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

A Wild West jailhouse that slid down the mountainside.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

A natural history wunderkammer in the middle of the desert.

These free-roaming horses were once destined to disappear from the land.

An artificial crater field that trained astronauts for lunar exploration.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.