The subtle science of a master molecular gastronomist.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

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

Six beautiful wooden giants are hidden around Copenhagen.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

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

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Ruins of a 10th century church tucked away deep in a botanical garden.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

2300-year-old Roman road connecting the empire.

Geothermal waterfalls in Tuscany.

Pompeii's less famous neighbor is still revealing her secrets.

The oldest operating pharmacy in the world features 800-year-old recipes.

The middle finger of modernity.

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

This Parisian gem is one of the most incredible ethnographic museums in the world.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.