Hangar-7 is a sleek glass-and-steel aircraft hangar near Salzburg Airport, built to display historic aircraft, racing machines, and Red Bull's collection of engineering toys. It is very different from Salzburg's baroque old town, which is exactly why it works.
The architecture is half the attraction, especially when the curved glass shell catches the light. It is also a good choice if you are travelling with someone who has had enough Mozart and prince-archbishops for one day.