Joel E.
Yelp
The Piazza San Marco in Florence is a fairly unimpressive square which is located in the Northern zone of the historic center of the city. However, it was the primary drop off point for the bus line which we arrived at when coming into the city center on a daily basis via public transportation during our week-long visit to Florence in March 2012.
The Piazza San Marco has become somewhat of a transit center for several bus lines, and also a place to pick up a taxi when the bus times are inconvenient. Taxis will not stop for you in Florence if you try to hail one in typical American fashion. Rather, Taxis can only be picked up either by phone call (which can be a problem if your US cell phone won't work in Italy, or only where you can pick up wireless service), . . . or alternatively if you know where a Taxi Stand or other regular pickup point like the Piazza San Marco is located.
The Piazza San Marco is located near the Piazza della Santissima Annunziata, and its attractions include the Basilica of San Marco, the main offices of the University of Florence and the renowned Academy of Fine Arts of Florence.