Central Europe: 7 days, 7 train trips, 7+ cities

In the Vienna Central Train Station (Wien Hauptbahnhof) to catch the train to Salzburg (2.5 hours trip) and spend a day there in Untersberg, Mönchsberg, the old city of Salzburg and the famous Getreidengasse. Then take the night train to Munich and then Heidelberg to visit a friend for 3 days, the historic city of…