400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

European castle ruins in an American state park are actually the product of death and grief.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A museum dedicated to the lovable crime couple Bonnie & Clyde, just a few miles away from the site of their early demise.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

Hub for hallucinogenic Amazon religion.

An art museum with an eclectic design and a scandalous past.

A self built castle built by a salt worker in Brazil.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

Many cities have held the title, but Brazil snatched the crown from Chile in 2011.

This spacecraft-shaped water tower is only a part of the mysterious UFO mania in this Brazilian town.

A snake farm famous for its venemous varieties.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

An acoustic anomaly with a mysterious cause.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Disused penal colony features prisoner artwork, some sketched in human blood.