The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

Giant topiary dog once played a role in a terrorist bomb plot.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

The final resting place of the great navigator, or maybe his brother.

The medieval town's star-shaped walls are geometrically dazzling, though not entirely impenetrable.

This chapel is the site of a yearly pilgrimage that originated during the Middle Ages.

A cluster of granite granaries perched on stilts.

This castle has links to Portugal’s founding and struggles for independence.

Dead weights honor the dead of Portugal's fishing industry.

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

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

Some 4,000 individual tiles make up this striking blue billboard from the golden age of air travel.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.

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

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.

The world's largest wooden structure.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.