If your trip to Lille is all sorted out but your travel itinerary is looking a little empty, let us give you a helping hand.You'll need to rise early if you're planning to check out all the interesting sights that this place has to offer. Old Stock Exchange and Lille Grand Square are non-negotiable. Rihour Square and Palace of Fine Arts shouldn't be forgotten either.Near the city center, Casino Barriere Lille is one sight you might like to consider putting on your must-see list. Zenith Arena Concert Hall and Euralille are also a stone's throw away and worth a detour.