Piazza San Marco is the big tourist area in Venice. It is where the Palazzo Ducale (Doge’s Palace) and Basilica di San Marco are among other photogenic spots. It is also the spot that is always photographed when Venice floods. They have the parts for the platforms for people to walk on placed strategically around Venice for when acqua alta arrives. The basilica is one of the lowest parts of Venice, and some tiny amount of water was present around the basilica when I was there. [The flooding essentially comes from below the buildings. It does not come from shores exactly.] I was able to wander around the area on two different days, which is why differing weather conditioning can be seen in the photos below.
Beautiful.