A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A multi-storied adobe complex has been inhabited for more than a thousand years.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

A Bibliophile's Dream.

Frida Kahlo's childhood home, now a museum of her life and works.

An underground magnet for ever-changing street art.

Scattered around Atlanta are little doors with big charm.

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

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Odd outsider art installations surround a Gold Rush-era ghost town.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

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.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The best Tiki bar in Las Vegas.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.