My husband and I are going to take a day trip to Verona from Venice. I saw a travel show on it and it looks like it has quite a lot of things my husband and I would enjoy like the Roman parts of the city. My question is how long should I give myself in Verona (not including travel time)? I would like to see some of the main sites and relax in a piazza but still make it back to Venice at a decent time. Any insight would be appreciated.