A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

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

This coffee shop lies hidden beneath a historic church.

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

A collection of machines designed to break things for science.

Hear the quietest sound from across the dome.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

Though it may look like a businessman's lost luggage, this case suspended under a highway bridge is actually a contemporary art installation.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

Vines grow up the metal bars in this public park created from an old machine factory.

This 21st century cabinet of curiosities includes dinosaur bones, moon rocks, film memorabilia, and more.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

Stumbling upon this whimsical wooded garden is like stepping into an enchanted forest full of philosophical musings.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

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

Art and armour fill every inch of this rich kid's Italian villa.