Jarmo and I managed to get a picture of the Högberget cave in the cover of the Cave Radio and Electronics Group (CREG) journal!
You can read the journal here. You'll need a subscription to read, but it is only 4£ per year. You can also subscribe to the more general Cave and Karst Science journal at the same place.
Read more urban exploration stories from theurbanexplorer.net, and other underground stories from planetcaver.net. Read the full Planetskier series at planetskier.net, or all blog articles from Blogspot or TGR. Photos, videos, and text (c) 2021 by Jari Arkko and Jarmo Ruuth. All rights reserved.
This article was originally published in the Planetskier Blogspot article series.
"Mongolia is kind of close, right? Story about an attempt to ski everywhere in the world where there's snow. And in some places where there isn't. On and off-piste skiing on all continents, skiing into craters of live volcanoes, climbing, photography, and travel." The Planetskier blog focuses on skiing, caving, climbing, biking, flying, sauna, and swimming adventures around the world. See the other Planetskier blog articles about skiing, caving, urban exploration, climbing, cycling, flying, swimming, and saunas.