The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

Guitarist Paco de Lucía overlooks travelers as they pass through this train station dedicated to his legacy.

This beautiful spit of land was once the summer playground of the king of Spain.

According to tradition, King Phillip II supervised construction of the seat of his empire from this seat carved into rock.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

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

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

The oldest Roman lighthouse still in use.

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

The earliest known map to show America, discovered by accident at a Paris bookshop.

The world's largest wooden structure.

Elaborate tile work in this railway station tells the story of Portugal.

These "bridges" help confused bats cross the road.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

Two large posteriors in one giant statue.

The legendary bathing site of a Moorish queen is actually part of a Roman fish farm.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.