This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This cheese shop also houses a museum devoted to Dutch dairy.

The history and future of cannabis.

The world's only museum devoted to the wonders of fluorescence.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

A perfectly preserved hill village where the buildings are painted like white lace.

A unique hotel for the artistic soul.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This doorless 20th-century elevator doesn't stop or slow down.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

The first museum in the world devoted to sexual gadgetry.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

A Jenga-style cylindrical tower of books that appears to go on forever.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

This 19th century cyclorama acts like an analogue time machine to a different era.

This tiny museum's sizable collection is jammed into a former underground public toilet.

A condom-covered Thai restaurant that is more concerned with birth control than food.

This 19th-century church is now a popular roller rink.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.