warning for danger upon the swiss jungfraujoch

abandonment air alp alps bernese blue border capped chill cloud cloudiness clouds cloudy cold cool covered crash danger deep deposition depth desolation europe european field height high holiday holidays ice impressive jungfrau jungfraujoch landscape mass mount mountain mountainous mountains mounts natural nature oberland panorama patches peak peaks pole rarefied red relief risk rock rocks rope shine shining sign silence sky snow stop structure summer sunny swiss switzerland thinness top tops tourism touristic travel triangle view warn warned warning waving white