If by chance you end up in vienna at some point, leave a pm i´ll show you around.
Well you want something exciting + ww2 monuments? i suggest crimea then. big enough town called yalta main city for tourists https://en.wikipedia.org/wiki/Yalta. also in every town there are many monuments instead of trees. (not surprising after how many people died during that time), even in my small town in the middle of the island there are 10,000 bodies burried in the middle of the town.
Leave your gun at home.