A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

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

Metro station with a claim to rock n' roll fame.

Berlin's old airport.

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

When the rain falls, this drain system turns into a musical instrument.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.