A town saturated in Italian rationalist architecture was once marshland drained by Mussolini.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Notorious artist squat renovated into legal studios.

This 11th century tower is said to be the oldest building in Oxford.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Used as an example in one of the first dictionary entries for "museum" in 1706.

One of Europe's oldest libraries.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Steadily reminding Czechia of its past.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

Monument to a suicide protesting the Soviet invasion.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A Jenga-style cylindrical tower of books that appears to go on forever.

Macabre astrological automaton clock dating to the late 1400s.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Ancient ruins hidden underneath a modern luxury hotel.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.