Berlin's Stasi Museum is housed in the very building where East Germany's Staatssicherheit had its headquarters. Inside this dominating concrete block in the eastern Lichtenberg district, visitors can wander around Erich Mielke's office, from where he controlled Germany's secret police.
The headquarters were stormed on 15 January 1990 and Mielke's rooms remain as they were found on that day. The museum also hosts a variety of different exhibitions showing the appalling workings of the Stasi and how they used to spy obsessively on the German people.