This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

A hands-off space for graffiti artists to hone and display their skills.

Banksy gives themself artistic license with this piece of London street art.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A kaleidoscopic warehouse-maze of handmade neon signs.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

What looks like a normal building is really a hollow facade hiding a subway vent.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

Former hunting lodge of a duke who was an avid collector of impressionist works.

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

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

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

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

This Parisian café sticks almost exclusively to an ethos of reuse.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

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

A surrealist timepiece by the artist of melting clocks.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

A museum of carnival attractions where you are invited to ride the rides.