This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

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

Five million people are laid to rest here, more than the population of Madrid itself.

The world's oldest bookshop still in operation.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

A centuries-old forgotten underworld lies beneath Malta.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

This subterranean necropolis holds three floors of antler-dug grave caves.

Picturesque intersection of witchcraft and ancient Christianity.

This Sri Lankan cemetery is the final resting place of sci-fi legend Sir Arthur C. Clarke.

A magician and his beloved, pampered canine were buried together, within days of each other, due to a tragic twist of fate.

Eastern Bloc nostalgia, anybody?

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

Climbing to the top of the cathedral's bell tower offers sweeping views of these medieval ruins.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

This museum inside a museum tells the story of London's timepieces.