The other weekend I visited Berlin and, the Castleholic that I am, wanted to squeeze a castle visit into my programme. Mind you, for being the German capital Berlin isn't as castle rich as one may think. The famous ones are probably Schloss Bellevue and Schloss Charlottenburg as well as a few smaller ones either repurposed or scattered on the outskirts of town. One of them is Schloss Glienicke, which is actually located closer to castle-rich Potsdam than to most of Berlin's other attractions. The name Glienicke itself is probably most famous for the bridge by the same name, also known as the Bridge of Spies as it was used several times for the exchange of captured spies during the Cold War.
Schloss Glienicke is open to the general public from April to October from Tuesday to Sunday between 10am and 6pm. During wintertime, the palace is open on the weekends between 10am and 5pm with certain closure dates around the holidays. Admission per adult (including a guided tour) is 6 euros. For more information, have a look here.