This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

The walls of the iconic dome are hollow and have a secret stairway.

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

What happens here stays here – unless it affects the whole world.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

The former hotel where Tesla invented the radio.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A dilapidated dock tells the story of Titanic's missed arrival.

A terrific purveyor of natural history objects and curios.

A student driver's nightmare.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A magical place that lets you play in and explore the world of Studio Ghibli.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Ham is serious business at the Prosciutto Museum-Serious, delicious business.