The colonial city's social history is reflected in its fanciful door knockers.

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 somewhat mysterious biomedical museum housed inside a Spanish university.

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

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

A controversial art piece that harkens back to local folklore.

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

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

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

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

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This enormous censer uses a pulley system installed over 400 years ago.

This 19th-century fountain's namesake animal isn't what you think it is.

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

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

Made up of 3,200 recycled glass bottles, this tree pays homage to Asturia's love of cider.

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

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.

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

Commonly acknowledged as the only public monument to the Devil himself.

This kitschy tavern is also home to rare early editions of "Treasure Island."

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.