Question: The highest point of the Arno Trail is atop the Sonnblick near Bad Gastein which is situated in a high valley of what mountain range?
Sentence (from "Bad Gastein"): Picturesquely situated in a high valley of the Hohe Tauern mountain range, it is known for the Gastein Waterfall and a variety of "Belle Époque" hotel buildings.
Relevant evidence: Yes