re: Please Help Us Decide - Europe

You could fly into Zurich and make your way by train to Vienna. Stop in st Anton, Innsbruck, maybe, Salzburg and then Vienna. Summer mountain lakes, hiking, beer, etc. The border of Switzerland and Austria is pretty sweet and one way flights will be cheap to those places.

That short u should probably really avoid any extra travel by plane or that’s not pretty in itself (scenic driving/trains)