Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

When this monument to Slovenia's national poet was erected, it's said to have sparked the ire of nearby church authorities.

A whimsical bridge adorned with decorative dragons.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This building features dozens of faces along its facade, although one is a bit chilling.

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

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

Five candy-colored villages on the Italian Riviera.

This saucy statue once caused outrage among locals.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Depending on how it is measured, this lighthouse can claim to be the tallest in Europe and the tallest conventional lighthouse in the world.

Massive galleon from a box-office bomb docked in Genoa.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

Erected in memory of Sir Arthur Conan Doyle, who was born close to this spot, this statue commemorates the author and his famous detective.

It may no longer take overnight guests, but the Martin still makes out-of-towners feel at home—just like it has for the past century.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

The remains of this misplaced church were moved here stone by stone.

Once a resting spot for King Fernando VII.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.