Slitherine

I would add flak towers, which were several stories high and nearly impregnable, to the Berlin map. They had the advantage of either being able to shoot at enemy aircraft or down into the streets. I remember reading that at least one of them was considered to be self-sufficient for several months, and even contained a field hospital. There is one fortress on the map; I assume that could be the Fuehrerbunker. The Reichstag would also be a good addition. I'm not too familiar with the topography of Berlin, having only visited one time 20 years ago, but I would make the Berlin map as realistic as possible.