Between 2010 23rd of February and 18th of March, a group of seven polish cavers (Sekcji Grotołazów Wrocław club) visited the mighty Arabica massif, namely the PL-1 cave, which was previviously discovered by them. In the cave they reached -620m depth, where a narrow fissure with outstanding draft stopped them. After five summer edxpeditions, this was the first winter expedition by them in this area. During the expedition, several “blowing holes” were found on the surface, making them promising tragets for the summer explo. original here