Macabre astrological automaton clock dating to the late 1400s.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Breathtaking and huge 430 year old maps of Italy.

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Bangkok's men with dangerous jobs come here in search of protective talismans.

A church made of steel.

The remains of an abandoned air force hospital located on a redeveloped Air Force base.

This eerie abandoned building with a dark history is said to be one of the most haunted places in the Philippines.

The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Morocco’s modern capital was once a haven for Barbary pirates, who went so far as to establish a republic of their own.

The other side is actually green.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.