The second-largest of Venice’s six sestieri, Cannaregio holds many gems for visitors keen on a neighborhood walk that includes some important sights as well as lesser-known finds. It’s also the northernmost of Venice’s neighborhoods, leading up to Fondamente Nove, from which the vaporettos to the islands (Murano, Burano, Torcello) and St. Michele depart. Here is how to make the most of a visit of this beautiful quarter, which includes the historic Venetian Ghetto, where it is easy to get lost in...