After World War II, the town of Wünsdorf, some 25 kilometers south of Berlin, became the headquarters of the Soviet army in East Germany, and thousands of Red Army soldiers were stationed there. At the time, it was a bustling, heavily guarded military base surrounded by high walls and barbed wire. Now it is deserted and crumbling. Here, a gloomy foyer welcomes guests to the complex that once housed Nazi Germany’s Supreme High Command of the Armed Forces.