I am planning a trip to Croatia. I have an overnight flight that lands at MUC in the morning and plan to rent a car to drive to Split. It's about an 8 hour drive. Since I really don't sleep much on the plane, I plan to do about 4 hours driving the first day and get a hotel in Ljubljana.
What sights are there see (excluding Salzburg because I've already been there) between Munich and Ljubljana that are not too far from the main highway? Would Grossglockner pass be too much of a detour?