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

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

This magical museum celebrates the life and work of a seminal children's book writer (and occasional spy).

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

Built for herding sheep, these tiny winding lanes with medieval origins and distinctive series of narrow turns are charming walkways for humans today.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

The commemorative stone column conceals a secret laboratory.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

A collection of noses tucked inside an art museum reveals how times have changed.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

In this recreational park, two artificial lakes share a surprising connection to Wembley Stadium.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The narrowest street in Paris.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

England's most famous front door has an accidental doppelganger.

This antique thermometer honors the creator of the first universal temperature scale.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

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