Venice is definitely my favourite city in Italy. The atmosphere there is magical. You are not only surrounded by historical buildings and places full of culture, but you also have fairy tale worth scenarios at every corner. The canals appearing at the most unexpected corner, the side streets, the water levels doors have just no comparison with any other city I have seen.
If you are touring Italy, you have to pass by Venice, even if you have only 1 day. See my list below of the most memorable places to see, as well as some snaps I took while wandering about Venice with no direction in mind (the best way to see the city).