Favorite thing: This map I found on the internet, it's pretty and shows you the villages in Tuscany. It would be a shame not to get out of Florence while you're there. The surrounding villages are just too beautiful!
Favorite thing: Through Florence runs the river Arno. The most interesting side of Florence is the side were the Dome stands, but when you have more time you should try to see some of the other side too ;o) On the map you can get an impression of what I mean.