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

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

The only museum with its curator—and her pets—buried inside.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

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

The mummified relic of St. Antoninus.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

A restaurant and observation deck built in a unique broadcasting antenna.

A surreal museum of extraordinary industrial objects.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This memorial museum chronicles the apocalyptic destruction of the First World War.

A moving memorial to the fallen and missing from WWI trenches.

A little sculpture with a large wardrobe.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.