Two days in Venice covers the iconic landmarks, the lagoon islands, and at least three distinct neighborhoods. Day one follows the greatest hits: take vaporetto Line 1 down the Grand Canal to San Marco, visit St. Mark's Basilica and the Doge's Palace in the morning before the crowds thicken, walk to Rialto for cicchetti at one of the bacari near the bridge, then spend the afternoon in Dorsoduro visiting the Peggy Guggenheim Collection or the Gallerie dell'Accademia, finishing at Santa Maria della Salute as the light softens. Day two is for the parts of Venice that most visitors miss. Start in Cannaregio, the neighborhood where Venetians actually live. Visit the Jewish Ghetto (the world's first, founded in 1516), explore Ca' d'Oro and its Franchetti Gallery, then walk east into Castello. The church of Santi Giovanni e Paolo holds the tombs of 25 doges. From the Fondamente Nove waterfront, catch a vaporetto to the lagoon islands. Murano takes about an hour (glass furnaces and the excellent Glass Museum). Burano is 40 minutes further, worth the trip for its painted houses and lace tradition. If you have time, Torcello is the most ancient settlement in the lagoon, with a stunning Byzantine cathedral that predates St. Mark's. Return to the city for an evening aperitivo along the Zattere or at Campo Santa Margherita, where university students mix with locals. A 48-hour vaporetto pass (35 EUR) covers all your water bus travel, including the island routes. Two days also gives you time for a proper Venetian dinner: book a table at a restaurant in Cannaregio or San Polo for dishes like sarde in saor, fegato alla veneziana, or fresh seafood risotto.