A Bridge Too Far?

In short, my school back home surprised me after I arrived here in Denmark with mandatory extra classes.  Complicating matters is the fact that classes here are not scheduled to allow for students to take multiple subjects at one time.  The outcome (I do like to game the system) is that although I was drastically overworked the first two months that I was here, I now find myself with very little school work left.  I only have class one day a week and starting in April zero classes a week.  I fear the boredom so its time to travel.  I will be in Berlin from the 6th to the 9th of April.  There will be a Saarbruecken trip in there at some point.  The question is where next to go?