This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

France's most famous cemetery, with some of its most curious tombs.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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.

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

Christ's blood allegedly preserved in a Belgian town.

Notorious artist squat renovated into legal studios.

King Ludwig I's collection of beautiful women.

Go surfing on this urban wave, "hacked" by local surfers.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

This pub built its reputation pouring post-shift pints for employees of the cemetery with which it shares a wall.

The house where the writer spent his formative years.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.