A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

360° views of the city plus five floors of optical illusions and hands-on science.

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.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

This monument celebrates this shopping district's past history as a feudal silver mint.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

Mythical beasts symbolizing the city of Tokyo guard a historic bridge.

This mysterious medieval grotto holds a grid of sacred wells of unknown purpose.

An ingenious solution to a tricky engineering problem, this spiraling bridge takes drivers for a dizzying spin.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

This modest marker near Notre Dame identifies the very center of Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Notorious artist squat renovated into legal studios.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This adorable birdlike police box is designed based on a play on words.

A railway station takeout shop sells boxed meals in containers shaped like trains and snowmen that hold the country’s abundant regional delicacies.

An oddly touching memorial to a little-remembered nuclear tragedy.

This little replica of Lady Liberty provides a bit of NYC in a Japanese city.

Cherry blossom season comes early in this Japanese town where pink flowers line the streets and riverbanks.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”