I will be visiting Europe from Dec 2 to Dec 15 to experience Advent and Christmas time in Europe. I want to visit the best Christmas Markets with the prettiest and Christmasy feel. I read that Zagreb was voted the best. Has anyone been there in December? Is it worth a side trip to visit? Any other towns in Austria, Germany, France, or Belgium that are musts to visit during the season? I have a Eurorail pass so I am very flexible. Thanks for any advise.