Inside a former cabaret, seven floors of erotic art.

The video game-themed street art first popped up in the French city.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

An unusual number plate signifies the building's saucy past.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A surrealist timepiece by the artist of melting clocks.

A mechanized clock where a man fights off a dragon, crab, and rooster.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Paris' linguistic guide to the international language of, yes, love.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

A remarkable cabinet of curiosities in an art space in the center of Berlin.

This TV tower once secretly housed a GDR intelligence team.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

An eerie, derelict amusement park in Berlin.