A wunderkammer of mysterious objects and stories.

Super-heavy Nazi architectural experiment.

A collection of abandoned typographic signs from Berlin and beyond.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

A slice of central Asia in the middle of Berlin.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

A huge enchanting public park just outside the ancient walls of Rome.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Architectureal fantasy quarter of Rome.

A forgotten "city of water" underneath the famous Trevi district.

An alchemist's "magic door" stands in the middle of a Roman park.

Rome is now home to a stunning food museum and library.

Its interior is adorned with some of the best examples of early Christian mosaics.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

Medical history with an amazing, if frighting, collection of wax diseases on display.

One of the deepest indoor swimming pools in the world.

A wonderfully kitsch bookstore the size of a supermarket.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

Lavish royal estate punctuated with heated greenhouses.

Meet the bronze beloved pet to a family of famous peeing statues.

This modern arts center is built around a gem of late-Baroque architecture.