Every inch of this chapel is covered in craftsmanship from across the world.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Thousands of well-dressed mummies below a monastery.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

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.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."

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.

Pilgrimage site for star-crossed lovers.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

The prototype for all Nazi concentration camps.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Rebuilt remains of a temple to Roman god Mithras.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.