The "Panta Rhei" building is also part of the BTU, the "Brandenburgische" technical university, and has an interesting look. And just in case you are interested, it is one of the most modern facilities to research lightweight construction materials(?) like Mg, Ti, Al,...
There are no hordes of tourists here and so not really any "beaten paths" but you probably won't find these in any city guide.
The central place of the Uni-campus has some nice blue lighting in the evening (see above), it's worth a look if you are not in a hurry.