The Salzkammergut is one of the most beautiful holiday regions in Austria. The name is coming from it's history. As the premier spot for Salt("Salz") Mining. As Salt is and was important it was directly controlled by the Emperors in Vienna - that's where the name "Kammer" came from.
Cities a little bit outside of the Salzkammergut but still part of it (According to their Marketing)
The TV series "Schlosshotel Orth" is playing there.