Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A hollow cement depiction of time's inexorable effect on the human body.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A monument to the art of slicing people open.

This hidden collection of everyday objects illustrates life within communist Poland.

A World War II torpedo launch station abandoned off the Polish coast.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

On this Polish road, an optical illusion makes cars seem to roll uphill.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

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

A piece of John the Baptist in the American heartland.

This abandoned prison castle has become an imposing gallery of graffiti art.

One believer transformed a local curiosity into proof of Vikings on the Great Plains.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

A four-hour holy-rolling, Hallelujah-shouting, Southern gospel service, rendered as a country market where "All Is Welcome, Jews, and Gentiles."

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

A former taxidermist has turned his old shop into a folk art mecca.

One person's lost luggage is another person's treasure.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

Grand opera on a miniature scale.

This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

The notorious couple camped at this site after a bloody shootout with police.