An ancient monastery, a locked room, and a mysterious book heist.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

Wander among free-roaming storks at the sanctuary that helped save them from local extinction.

The world's most famous cheese caves.

A beautiful modern church dedicated to the teleporting patron saint of Andorra.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

You can still walk across this beautiful medieval bridge in Andorra.

Designed in the Romanesque style, this structure was once a fortress monastery.

32,000 tiny soldiers are posed in 23 historical settings.

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

An impressive home made of stone, carved more than a century ago.

The prolific artwork of a self-taught sculptor.

A landscape decorated with enormous skull sculptures.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

These Bullet-scarred bunkers are haunting reminders of the Spanish Civil War.

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

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

A breathtakingly steep set of stairs is carved directly into the face of the sea cliffs of Bonifacio.

According to tradition, King Phillip II supervised construction of the seat of his empire from this seat carved into rock.

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.