One of the places i went first in Florence was the Galleria dell Accademia which is where the statue of David is. Unfortunately you are not allowed to take pictures in side (there are tons of people watching for you to try, so click this link http://bpphoto.smugmug.com/photos/12219388-L.jpg
to see the statue. In person the statue is amazing. The details like veins in the arms is incrediable.
