I've been to Venice once - happened to arrive (without planning it!) right in the middle of Carnivale. We couldn't find anywhere to stay of course so we wandered the streets with our new masks & left on the overnight train. We'd have slept out except that it was snowing in February for the first time in 25yrs and it was freezing!
Venice....On this trip, although I have been to Italy...we are going here to really see it. I have only been in Florence and the surrounding area. And we will go to visit where both my paternal grandparents lived!