Most-visited and most-photographed slot canyon in the American Southwest.

World's largest collection of serial killer artwork and other macabre exhibits.

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

An exquisite tunnel of cascading flowers.

On Japan's Tashirojima Island, cats are king.

Brazil's only museum dedicated to the art and evolution of tattoos.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A European-style bath house in Chicago.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

The world's only known button museum.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The history of funerals and funerary customs.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Spanking machines, fake goats, and more devices of humiliation are on display in this museum of fraternal initiation devices.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

A chessmaster's dream destination.

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

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A bizarre house filled with an astounding array of collections.

A modern-day Lascaux cave underneath Paris.

A subterranean shelter remains intact under a busy Paris railway station.