San Marco is one of the sestieri of Venice located in the heart of the city, including the island of San Giorgio Maggiore. It is strategic point from where you can reach the main places of interest.
This district is the original core of the city. In particular, Saint Mark Square was the center of political and judicial system of the Republic of Venice for nearly a millennium.
The small district includes many of Venice's most famous sights, including St Mark's Square: you can admire the beautiful Palazzo Ducale and famous Bridge of Sighs, the impressive Basilica of San Marco and the picturesque Clock Tower with its statues of the Venetians Moors that mark the time by hitting the bell on the top of the tower.
The nearest vaporetto stop is San Marco.