A lot of Ravensbruck is also extant and preserved - including nearly all the SS accommodation. Parts of what was the DAW armaments factory attached to the camp are still in use as industrial units, from what I can tell from Google Earth.Sachsenhause near Berlin, about 45 minutes on the S Bahn from the Brandenberger Tor into Orienburg and a ten minute walk through the town. You walk down a road flanked by houses that are still lived in which were built for the camp staff. Just opposite still standing is the T Building which was built to house the concentration camp system management and inspectorate which now houses the local tax office.. The camp itself was occupied following WW2 like Buchenwald by the Russians as a special camp. A very strangely silent place, sinister as you wlk through the A building gate onto the appelplatz. The other place is the Stasi prison, in Berlin that is sinister in the extreme is Hohenschönhausen in the Lictenberg district.
Drove through Furstenberg in 2013 and saw the signs to the camp (it's another holocaust memorial) but didn't realise it was so close. Ditto Oranianberg/Sachsenhausen.