The Stasi Museum in Leipzig, Germany.  For those who have never heard of it, the Stasi was the East German Little brother to the Russian NKVD internal security Secret Police.  The Stasi maintained a network of informers within both East and West Germany during the Cold War and also maintained dossiers on almost every German, even many in the West.  In East Germany (GDR) the Stasi was the government organ responsible for internal security and ferreting out dissidents to the regime.  They did this by doing some things that made the  Nazi Gestapo look like amateurs.
Below are some of the photos I took in our hasty tour of the museum before it closed.