A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

A 12th century church completely covered in shells.

The oldest Roman lighthouse still in use.

Giant granite sculptures representing family on the northern coast of Spain.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

This enormous censer uses a pulley system installed over 400 years ago.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

The remains of an encyclopedic sculpture garden later used as an internment camp.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

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

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

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.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

When you're a great Russian Tsar, even your vomit gets a statue.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."