This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Copenhagen's celebrated theme park and gardens.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

This former World War II torpedo testing location is now an important nesting site for migratory birds.

A Victorian marvel of engineering is now a 21st-century tourist attraction.

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

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Barça football fans might see the insignia hidden in a church window as a divine sign.

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

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

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

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

A small square plaque marks a failed assassination attempt that could have changed history.

One of the most easily accessible examples of the rare 1960s UFO houses.

A fearsome dragon clings to a corner of Munich's city hall.

The footprint of a frustrated devil in Munich's Cathedral.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.