A strange anthropomorphic stele with a mysterious inscription that has never been deciphered.

The tallest tower in Cáceres's Old Town.

For centuries, one side of this basilica has integrated local archaeological finds.

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

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

This 13th century convent is now a medieval painting museum.

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

The facade of this 16th-century building is decorated with carvings of 300 seashells.

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

Maybe the most iconic character in the Easter (Holy Week) processions in Zamora.

The best collection of Mudéjar building replicas gathered in a theme park in Olmedo.

This Castilian castle has stood the test of time like few others.

This fine building houses an even finer military museum.

This tranquil urban park has a violent history.

The camera-toting gargoyle juts out from the exterior of a Gothic cathedral.

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

For more than half a millennia, this automaton has rung an hourly bell.

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

The former home of a conniving 17th century politician is now a high-end hotel.

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

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

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

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

The fragmented remains of a massive public bath connected to the city's water supply.