A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

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.

In the Mound Hill Cemetery resides the final resting place of the world's tallest couple.

An architectural oddity hides in plain sight on this iconic London bridge.

A memorial for public executions that dates back to the 14th century.

The ground on which Shakespeare’s initial playhouse once stood.

A unique tribute to the millions of animals who served and died for the British military.

This striking statue brings a scene from the African savannah into central London.

An unusual round church in London with a Templar past.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

This cheese shop also houses a museum devoted to Dutch dairy.

This tribute to the fictional detective stands at the famous literary character's address.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

Home of one of history's most famous cartoonists just as he left it.