Eastern Europe, especially Poland and the USSR - but these were the untermensch people and thus "deserved" it. London also suffered a bit, and would most likely suffer more if the Luftwaffe had the capacity do carpet bomb it.
I am not trying to justify the bombing of Dresden or any other civilian target. I am just cognizant of the fact that many hearts must have been filled with joy at Dachau or Mauthaussen hearing those bombs falling (Auschwitz was no more at that time).
Wojtek