The bridge is quite beautiful and one of Ghent’s prides, so be sure not to miss it when walking around the city. What I like the most are the façades on Graslei, the houses show a kind of romantic architecture and make you breath their history.
What I suggest apart from walking around and taking pictures regardless of the season (frozen river and snow all around make it a beautiful postcard, but oh boy when the sun comes down you can get gorgeous pics too!), is to lay with a glass of wine or whatever you want to drink, sitting next to the river with your friends. We used to do that a lot, girl chat until the sun came down and we started to feel a bit cold!