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.

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

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

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

A collection of riverboats of the Spanish royal family in a quaint museum.

A massive birdcage in this royal, 18th-century garden has sparked a local controversy.

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Rare karst landscape eroded from a flat seabed.

These megalithic tombs contain some of the largest stones ever moved in prehistory.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

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

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

The cathedral of a controversial, conservative, schismatic sect that declared the Catholic Church heretical and founded its own succession of popes.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The devil-defying mark left by a saint as a boy is visible inside Lisbon's cathedral.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

Eat the ultimate iteration of Portugal's most beloved pastry.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A unique seaside cave where Aleister Crowley faked his own death.

This unreal Portuguese palace looks as though it's made from a pile of different castles.