Berlin is also full of empty spaces for historical reasons. Previous rulers intentionally built some things big and far apart for their capital, WW2 left even m

Berlin is also full of empty spaces for historical reasons. Previous rulers intentionally built some things big and far apart for their capital, WW2 left even more unused spaces after the rubble was cleared and during the cold war only some parts got rebuilt. So even compared to most smaller German cities, Berlin has a low density overall.