Siena is a stereotypical Tuscan hill town.  It has a large open area at the center of town with neighborhoods arranged around it in irregular wedges.  The open arena here is the site of the semi-annual palio, a horse race whose prize is bragging rights for the winner among a dozen-or-so competitor neighborhoods.

San Gimigniano, like its sisters, is a walled town.  These towns date from before the Roman era when fortification against raiding parties was the only way to keep the denizens safe.

Pisa is most famous for its leaning tower.  Maybe I'm crazy, but this doesn't look like it's leaning very much to me.  What about you?