A modern reimagining of a medieval city gate.

Four giant movable street lights decorate this modern Rotterdam square.

The hands on this clock appear to be created by two workers sweeping debris into careful positions.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

A fantastical and futuristic temple of light built from nine monumental glass veils.

A beautiful deserted greenhouse in the middle of a park.

The largest cemetery in Chile is the final resting place for more than 2 million people, from politicians to artists.

Climb inside an iron crystal magnified 165 billion times its normal size.

Meet the bronze beloved pet to a family of famous peeing statues.

The mummified relic of St. Antoninus.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Breathtaking and huge 430 year old maps of Italy.

These spartan apartments are provided to clergymen visiting Vatican City.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.