The Dachstein Sky Walk platform in Austria sits above the steep face of the Hunerkogel, 2700 meters high. As a tiny part of the base is glass, you are free to gaze down the icy valley, or look straight ahead. Under your feet: the Hunerkogel rock face dropping away 250 meters straight down. All around you: an unrivalled mountain panorama. Ice Palace is a fascinating world of ice, light and sound.