The Piazza San Marco (or St Mark’s Square) is on every visitor’s list of must-see sights in Venice. Home to the Basilica San Marco, its Campanile (bell tower), a stunning clock tower, and around the corner from the Doge’s Palace, it really is the center of activity in Venice. Take a guided tour to make sure you see everything there is to see, or find a seat in one of the square’s cafes and watch the world go by.