Venice more than Piazza San Marco....
Venice a romantic destination with many attractions. Its small, traffic-free streets along the winding canals make for great walking. You'll find many magnificent churches and palaces, lively squares(San Marco most popular), and interesting shops. Remember not to eat in the square, unless you are prepared to pay 8Euros for a coffee...that also goes for any purchases in the square, double the price of everything!
Venice actually consists of 117 bodies of land connected by more than 400 bridges over its 150 canals. The Grand Canal is like main street, cutting through the center of the city. Must do a gondola ride, but book this before you travel...the line up to buy your ticket is long.
Must see Murano Island if you are interested is beautiful glassware, only a 15minute ferry ride away. Burano if your interested in lace items...great prices...but remember to ask for your best price.Try pizza at Cip's Club at the Hotel Cipriani on Giudecca, an island facing Venice...the view of Venice is AMAZING!