The plague quarantine island home to the alleged "Vampire of Venice."

This sturdy, circular stronghold served as one of the forts that protected the Venetian Lagoon.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

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

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Go inside to really appreciate this 500-year-old technological masterpiece.

Venice's "Island of the Mad."

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

A larger-than-life statue of the German revolutionist stands proud in a small town where he never lived.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

After the parade, students throw their beads on the tree hoping for good luck on exams.

A fearsome dragon clings to a corner of Munich's city hall.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

One of the world's heaviest musical instruments towers within a popular urban park.

Before serving as James Bond's Casino Royale, this Victorian-era spa catered to the world's elite.