The fourth-largest city in Austria is a UNESCO World Heritage site since 1997 and the second you see the impressive fortress looming over the Baroque old town of the city you know why. Salzburg is one of the most fascinating towns in Austria. It’s Mozart’s birthplace, most of The Sound of Music was produced here and of course, there is a beautiful old town just waiting for you to explore. The whole setting just spells perfection and it could be a lovely addition to your Austria itinerary, after or before you continue onwards to Innsbruck.