An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

Only a fragment of this 15th-century Dance of Death survives today.

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

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

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

A quiet Sicilian village is home to a cafe that had an important role in "The Godfather."

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

Two stone columns flank the grand Venice square, but there were supposed to be three.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

The world's most active stratovolcano is almost always erupting.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

Five candy-colored villages on the Italian Riviera.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

This historic black and white monastery is one of Bulgaria's architectural jewels.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.