This enormous abandoned prison was once dubbed the "Bastille of Romania."

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

This once-derelict building is now one of the most beautiful bookstores in the world.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

A collection of old neon signs from all over Poland line a secluded courtyard.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

These 18th century gardens tell a rocky story of the son of Odysseus.

An ancient pagan site swirling with legends in the foothills of Franconian Switzerland.

During World War II, the Nazis repurposed this beer cellar to store stolen artwork.

A neighborhood park in the city of Cáceres hides what some believe are revolutionary examples of Neanderthal cave art.

This small Spanish village is home to dozens of public paintings meant to trick the eye.

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.

The final resting place of the great navigator, or maybe his brother.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

Spain's stunning solar energy plant.

Dead weights honor the dead of Portugal's fishing industry.

This small chapel is built of human bones and decorated with a golden skeleton.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

You can cross from one country to another in a single hop on this little bridge.

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

A neolithic tomb converted into a tiny chapel.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.