A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Secret refuge and museum of the Duke of Florence.

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

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

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A garden of flying flowers.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

A moving memorial to the fallen and missing from WWI trenches.

A little sculpture with a large wardrobe.

The Devil’s own choice when he needs a drink in Brussels.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

It's always summer at the beach inside this former airship hangar.

Cold war icon and onetime "hole" in the iron curtain.

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

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

A fascinating insight into daily life in the Eastern Bloc.

A Museum of Psychiatry in a still-operating mental institution.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Climb inside an iron crystal magnified 165 billion times its normal size.

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

The only museum with its curator—and her pets—buried inside.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.