Permafrost

Links

1. https://www.ifgeo.uni-bonn.de/de/studium/mug/bildmaterial_mug/geoalpen.jpg/image_view_fullscreen
2. https://www.ifgeo.uni-bonn.de/de/studium/mug/bildmaterial_mug/geoalpen.jpg/@@download/image/geoalpen.jpg