The problem is that I have to come up with a route and program for what we are going to do for 1 day. But I have no clue about what to do in Berlin. I have been there 2 times before, 1 time in 4-5 days and another time only a couple of hours. So what is worth seeing in Berlin except for the famous wall and the Sony center? Anything special to see and do there?
So all your tips will be greatly appreciated