The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

An elaborate Roman funerary monument dedicated to the family of Scipio.

Mysterious texts covered in mystical symbols were found in caves at this site centuries ago.

This 11th-century fortress is now the seat of Aragon’s state legislature.

A masterpiece of Gothic-Mudejar design in Ciudad Real.

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.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

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

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

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This ancient Spanish castle sits high upon a hilltop.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

This mansion oasis contains gardens, sculptures, and fountains just off the busy Plaça Kennedy in Sant Gervasi.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

Moorish signal station on a stratgic rocky outcrop.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

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

Abandoned Nazi train station turned underground astroparticle laboratory.

An early 20th-century bullring converted into a modern shopping center.

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

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts