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

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

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

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

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

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Started as a kitchen garden, now the second largest botanical garden in the world.

The most visited, and possibly most controversial, museum in Germany.

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

Thousands of well-dressed mummies below a monastery.

Every inch of this chapel is covered in craftsmanship from across the world.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Walk through a fairytale in Tuscany.

Geothermal waterfalls in Tuscany.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

One of seven Jewish catacombs in Rome and one of only two open to the public.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.