I’m in the mountains... in Switzerland - in the Valais - on the Riederalp. I’m enjoying the view of the surrounding mountain peaks on this late summer afternoon. An alphorn plays a melody. The echo comes back once, twice, no, three times from the mountain slopes! It’s getting dark. The melody of the evening blessing from Humperdinck’s «Hansel and Gretel» comes to mind. It is night. A new day begins! I make my way to Riederfurka, to Villa Cassel (www.pronatura-aletsch.ch). There, I am gr...