Rennes, France
Rennes is a much nicer visit; good for a couple of days, especially if you like to run. Rennes is a big university town - 60 000 students, 200 000 permanent residents - and an old university town at that. I found guallic churches and crooked medieval taverns walking about.
As for stuff to do - there's a wonderful garden called the Place Thabor (I might be wrong on the name). It's a French garden rather than a Victorian one - all the landscaping is obviously ...