This massive crater in the middle of nowhere was used to train astronauts for moon landings.

There's nothing creepier than a cemetery next to a clown motel.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

An eatery for UFO seekers on the Extraterrestrial Highway.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

This former office building has been transformed into an immersive music venue and art space.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

The world's largest collection of mechanical puzzles is a cornucopia of analog bafflers.

Tucked away in the forests of Indiana resides an abandoned waterslide that is now a popular graffiti haunt.

Ornate limestone building now filled with geologic specimens, and more.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

This mosaic-covered bar is brimming with curated curios.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.