We are staying outside of Bologna and have one extra day to visit either Modena, Parma, or Ferrara. We are a young family traveling with our four year old son. We enjoy just walking around historic areas, seeing little shops, people watching, and having a nice casual lunch. With our son in tow, we are less interested in visiting lots of churches and museums -- just want to go to the place with the most beauty and atmosphere. What do you all recommend?
This visit will be this weekend on either Saturday or Sunday (recommendations of which days to go also welcome!).