> Rio dei Meloni, S.Polo (N part only, there’s an unpassable bridge in the middle) Canale d. Galeazze, Darsena Vecchio, Castello (Arsenale – navy area)

Keeping up the famous tradition of italian commando frogmen (Regia Marina MAS X), you could secretly cross these cordoned off areas in a submersible rowboat, called a Sleeping beauty.