Only the facade of this house was built so a father could fool his son.

A tongue-in-cheek arcade where the games are based on everyday life.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

This 1920s Dutch barge is now a floating bookstore.

These ornate arches show how the course of the River Thames has changed.

The television series' iconic giant foot was borrowed from this classical painting.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

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

The telescope that discovered Neptune.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

David Sedaris called it "The greatest shop in the world."

This ultra-modern burial building would have stacked the dead like a giant filing cabinet.

The Andean town where every single building is decorated with a brightly colored frieze.

Tiny communists hammer away on the Olomouc Astronomical Clock.

A concrete plant shaped like four giant soldiers commemorates one of the most decisive battles of the Napoleonic Wars.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

A modern sliver of architecture in Roma.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

A grassy pyramid named after a French battle.

This historical Netherlands fortress still bears the marks of its single siege.

This collection of solar timekeepers includes the world's first digital sundial.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.