A boulder in the Churchyard of Down Cathedral marks the legendary burial place of "The Apostle of Ireland."

This small Spanish village still pays homage to the Spaghetti Western films that were shot there in the 1960s.

The extensive relics of an ancient Roman and Phoenician fish processing plant hide in a town park.

Look closely and you'll spot the remains of an ancient Roman aqueduct beside this fountain.

The world's most elegant power lines.

The defensive tower was built centuries ago to warn locals of Berber pirate attacks.

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

This 16th-century building features a flamenco stage on its ground floor and a torture museum on its upper floors.

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

This medieval synagogue survived the Inquisition as a hospital and church.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Rare karst landscape eroded from a flat seabed.

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

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

A monument to one of the greatest matadors of all time.

A 16th-century Andalusian palace.

The world's largest wooden structure.

Spain's largest bullring offers a unique glimpse at architecture and history.

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

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.

This Moorish fortress has guarded Málaga from the slopes of Gibralfaro hill for nearly a thousand years.