Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

This castle played host to the largest great hall found in medieval Central Europe.

The hallucinogenic center of the ancient world.

The world's tallest bridge is also possibly the most elegant.

Long tunnels run under the ancient chariot racing circuit to the tower.

Stunning Roman aqueduct used for 1900 years and still standing.

Historic medieval fortified city in southwest France.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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.

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

Mountain where Jesus was first tempted by the Devil.

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

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

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Village situated on a narrow volcanic escarpment.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

One of the world's most complex timepieces.

For over 300 years this little carving has been the city’s good luck charm.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

There has been an astronomical clock on this spot since the 14th century.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A true Valhalla for cactus and succulent lovers.