A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Drink wine handed out through a window as part of an age-old tradition.

Secret refuge and museum of the Duke of Florence.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

A beloved local artist has been honored with this statue of a man emerging from a toilet.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

Featuring a meatless buffet fit for kings, this family-owned Zurich eatery is considered the oldest vegetarian restaurant in the West.

Vines grow up the metal bars in this public park created from an old machine factory.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

Walk through a restaurant's refrigerator door to reach this hidden bar.

Large Hadron Collider and the Birthplace of World Wide Web.

This building has survived for more than a century and remains virtually untouched.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The first museum in the world devoted to sexual gadgetry.

A Jenga-style cylindrical tower of books that appears to go on forever.

Macabre astrological automaton clock dating to the late 1400s.

The celebrated eyesore created by starry-eyed sweethearts.

Paris' linguistic guide to the international language of, yes, love.