Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

English antique dealers with a taste for the unusual.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

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

A tongue-in-cheek arcade where the games are based on everyday life.

Eighty million natural history specimens call this gargantuan museum home.

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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This massive piece of artwork weighs more than 250 tons, and was designed as a tribute to the first president of the United Arab Emirates.

A unique configuration of blown glass can be found inside this hotel lobby.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

The wreckage still sits at the exact spot the plane crash-landed in 1945, carrying 1,000 pounds of explosives.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

This expansive bridge in the Canadian wilderness was originally just built for friends.

Historic psychiatric asylum and most-filmed location in the Great White North.

This mesmerizing kinetic sculpture blossoms endlessly in the breeze.

One of the smallest bookstores on the planet.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

No one knows how many bodies are in this vault in a Chicago public park.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Shop of curiosities with a dinosaur museum tucked in its basement.