A historic Christian shrine nestled within a spectacular natural cave.

An ongoing medieval tradition of communal pig husbandry is honored with a handsome granite sculpture.

A spectacular walk on the flank of a gorge.

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

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

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

A huge cathedral single-handedly constructed by one eccentric monk.

Whether they are bulls or pigs, these ancient animal sculptures are fascinating relics.

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

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

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

A controversial art piece that harkens back to local folklore.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

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

The gaunt visage of this angular Christ giant is enough to put the fear of God into all who see it.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

This charming, medieval walled village is Spain's first "book town."

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

A somewhat mysterious biomedical museum housed inside a Spanish university.

An automaton perched above an classic clock and watch store