Gorski kotar underground #2

Significant part of Gk is made of clastites of younger Paleozoic. However, there are large parts of porous and soft limestone, a friendly environment for numerous pits and caves. Two deepest caves/pits of Gorski Kotar are Stupina jama/Fužine, -413m and Kicljeve jame/Ravna gora, -285 m (image taken with the APS camera, sorry for the scan quality)