Honecker Bunker in Prenden (Berlin)
perhaps an interesting information to make direct experience of the former DDR cold war reality.
The Bunker of Honecker (former DDR chief and Head of the NVR - National Defense Council) is open to be visited till the end of October. After that date it will be definitely sealed, waiting the next years the city of Berlin to have some money to transform it in museum.
The location is in the forest of Prenden, 40min by car northern of Berlin. There are visits in German most but also some in English. Recommendable!