Beside Checkpoint Charly on Friedrichstrasse the Glienicker Brücke was probably the most famous border checkpoint between West-Berlin and the surrounding Eastern German Republic. It got it's nickname "Bridge of Spies" from the several exchanges of spies and prisoners between the US and the Soviet Union, which took place right here in the middle of the bridge.
(Wikipedia)
Today it's simply a nice bridge, connecting the southwestern part of Berlin to the beautiful city of Potsdam.