Florence was my favorite town to just walk around. It is small in size and has amazing buildings and churches around every corner. The main areas of town are busy with tourists but if you get off the main streets there are few fewer people. The Ponte Vecchio bridge is well worth wandering to along with to the Medici Chapels. We didn't go inside much as we only had one day, but I would love to go back to Florence to see it more in depth.