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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This one-time health resort was used by aristocrats around the world.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Romania's triumphal arch looks out over Bucharest.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

An underground city of salt.

The world's largest moose statue towers above the highway between Oslo and Trondheim.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

Home to three historic ships from the age of Vikings.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The modern birthplace of Irish freedom.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

An ancient octagonal weather station named for the eight Greek gods of wind.