Veerle Sterken and Martin Gasser (in the picture) of the Swiss Society of Speleology, division Bern, explored at Jungfraujoch the highest situated cave in Europe. The goal was to compare an existing map of the cave from 2004 to the current state to note down any changes (e.g. ice, crystals) and to try to advance further into the cave.
Picture: Veerle Sterken
Picture of the month in past years: