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

Secret refuge and museum of the Duke of Florence.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Caves famous for the dragon-slaying saint who lived there.

A collection of objects supposedly singed by the hands of souls in purgatory.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

The underground sanctuary of a mysterious ancient cult.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Overlooked amid the tourist bustle of Florence, this museum is dedicated to the craft of stone inlay.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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

A surreal museum of extraordinary industrial objects.

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