The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

This influential Renaissance-era library was once the haunt of kings and monks.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

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

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

Just like in Hollywood, Madrid has also a forgotten walk of fame.

A historic Christian shrine nestled within a spectacular natural cave.

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

Giant topiary dog once played a role in a terrorist bomb plot.

A network of hundreds of interconnected wineries in caves hides under the town center.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

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

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This lucky bronze frog was gifted to Madrid by a casino.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.