My wife and I are going to be visiting Pisa in late March as part of a one-week vacation in west-central Italy. Aside from Pisa, our major stops are going to be Florence and Orvieto. (We're flying out of Rome on the morning of Good Friday, but we're probably going to avoid spending any time in Rome to avoid the Easter crowds.) Since Galileo is from this area what do I want to see while I'm there or anywhere nearby? I'm especially interested in anything that a Physics geek (i.e., me) would find interesting but that might not show up in the standard tourist guides, etc.