An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Liechtenstein's royal family calls this medieval alpine castle home.

A monument to the real explorer and bear who inspired characters in Philip Pullman's 'His Dark Materials.'

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

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.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

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

Breathtaking and huge 430 year old maps of Italy.

This medieval church is not only notable for its architecture, but also its connection with LGBTQ+ history.

The celebrated eyesore created by starry-eyed sweethearts.

The video game-themed street art first popped up in the French city.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.