I am planning to take the train from Milan to Copenhagen with my husband and two children (twins, age 9). We are trying to get advice on where to stop in between- such a huge swath of Europe! We are most interested in seeing the natural sites- mountains + lakes, and have a day or two in major cities, although we are looking for advice on which cities would be best for kids.
Does anyone have a travel agent they recommend to help us with this?
Or do you have advice yourself?