With some 20 million tourists roaming about its narrow streets each year, the vast majority of whom only come for a day trip and thus try to see as much as they can as quickly as possible, you can expect all of the most popular attractions and sites in Venice, Italy to be packed pretty much 365 days of the year, unless there's significant acqua alta flooding or a global pandemic like coronavirus with its European base of operations in the Veneto region. Nevertheless, all of the attractions listed below are mandatory must-sees on anyone's first visit to the Most Serene Republic. On subsequent trips you can feel free to skip them, or at least not bothering stopping too long when you pass them on your way to cooler, more interesting off the beaten path spots in Venice.