Today’s question is short and sweet:
“what can you do in bielefeld”?
Some people would say, “nothing because it doesn’t exist“. But let’s indulge a little bit and pretend that it does exist, here are the Main Sights, according to Wikipedia.
But I guess, apart from that you can pretty much do everything in Bielefeld that you can do in any other city of it’s size.
kalafudra's Stuff 
I can’t believe anybody actually asked that question.
I mean, why would you want to know?
“What can you do *about* Bielefeld?”, certainly, or
“How does one get out of Bielefeld?”… ^.~
Well, you know, the places you go and stuff… ;)
But I definitely hear you.