Ancient snack bar of the Roman Empire re-opened.

The walls and streets of the ancient city are peppered with penises.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

Christ's blood allegedly preserved in a Belgian town.

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

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

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Drink wine handed out through a window as part of an age-old tradition.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The middle finger of modernity.

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

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

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.

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.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

An art-filled botanical garden and former dyeworks hiding in plain sight.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Two stunning 17th-century libraries and a cabinet of curiosities.