Going to Paris for 6 or 7 days, setting one day aside for a day trip. My friend and I are 20 years old, not really interested in anything specific, but just nice to go on a daytrip to a sizeable city located max 2 hrs away from Paris that's cheap to get to. We want somewhere that will provide a different feel, visually, from Paris. Any other suggestions would be great. Not really interested at the moment in going to a sleepy location like Giverny etc.
Can anyone tell me what Lille is like?
thanks