This fast-food outlet is the only space and UFO-themed McDonalds in the world.

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

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

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

A Saint Nicholas-themed ghost town in the Mojave desert.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Petroglyphs, bird watching, and a 100-year-old Ranch in one location.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

A Tucson museum and performance space full of found-object movable sculptures.

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

This golf ball–shaped former desert real estate office now houses a UFO museum.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

What is the Thing?

Miniature art that tells an enormous story.

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

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

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

One of the largest, oldest, darkest, quietest motel rooms in the world.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Rippling sand dunes frozen in the Arizona rock.

A self-built castle made by a mysterious man.

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