My family would like to take a day trip from Munich to Salzburg. What sights or activities would appeal most to 19 and 16 year old boys? Our trip consists of 6 days in England and 4 in Munich so they will probably have seen enough castles by then. Would the salt mines be a good choice or are they better for younger children? Also, do any of them have size/height restrictions for the slide or any other part of the tour?