This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

The relics of dozens of martyrs are stored in a single chapel.

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

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

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

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

The mummified relic of St. Antoninus.

A plaque on the base of this statue holds a bewitching design.

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

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This banal Parisian entranceway is not what it seems.

Order a boozy baba au rhum at the oldest patisserie in Paris.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

This modest marker near Notre Dame identifies the very center of Paris.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

A 30-foot-high stream of chocolate flows continuously at the Lindt Home of Chocolate.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

The largest and best-preserved rotunda in Prague.

A saintly relic hidden in a Prague church basement.

A quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

A Baroque mansion with ties to legendary magicians and alchemists.