Mein Vater kommt aus Berlin
Say hi to my Aunts!
If you have freinds or, family there and, war history is important. You can get into "clubs" where the 'ol boys hang out, watch soccer and, of course, consume beer! Kinda like a legion (except usually not so well advertised)... My fav was peeing on a wall with a trough at the bottom! (Not too popular here!) and, buying clothes by the Kilo! (as opposed to tagged items...they weigh what you leave with!)
Christmas is a nice time to be there too! Potsdam Platz is a neat area. Honestly, if war stuff is your thing, no shortage of it but, there's LOTS of other cool things about that nation too.