We will be in Venice for 10 days around Christmas to New Year. Which day trips do people recommend most? We're considering Padova, Verona, Vicenza, Ravenna, Bologna, Trieste - but obviously we can't do all of that! We won't have a car so are interested in things we can do by train, but I understand many of the sites in Vicenza and perhaps elsewhere are closed in December. Also - is it practical to visit two or more towns (e.g. Padova, Verona and/or Vicenza) in one day?