Astberg Speichersee is a stunning mirror lake that can be reached either by foot or with a cable car from Going am Wilden Kaiser. From the lake, you'll have a stunning view to the Wilder Kaiser, the "Koasa", one of the most famous mountain ranges in Austria. On a day with no wind, you'll get an amazing reflection of the mountain range in the water of the lake. the lake is not a natural lake, but a water reservoir for the ski area.