A collection dedicated to the treatment of disease, held in London's oldest hospital.

London's smallest police station is barely the size of a phone booth.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Hear the quietest sound from across the dome.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

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

One part local history, 99 parts gruesome haunted house.

The largest of London's subterranean rivers and once a mad, bad center of London life.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

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

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

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.

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

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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

An eerie, derelict amusement park in Berlin.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This semi-secret storybook hedge maze is also the oldest garden in the city.