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

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

Thousands of well-dressed mummies below a monastery.

This amazingly preserved Doric temple was abandoned before it was ever completed.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

The (fictional) address of Sweeney Todd's bloody barbershop.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

This inn of the court provides a fascinating window into London’s legal and architectural history.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This magnificently macabre shield shows the power of chivalrous love in medieval times.

Visitors to Kuala Lumpur can drink in the city’s offerings at the Royal Selangor pewter factory.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

This museum features over 100 playable pinball machines, some dating back to the 1850s.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

An art installation memorializing a tram stop, which became a tram stop.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

Portraits of musicians line Oude Binnenweg, the jazziest street in the city.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.