KARST PHENOMENA: PODSTENICE SINKHOLE
Podstenice sinkhole or Podsteniška koliševka in Slovene is the largest sinkhole inKočevski rog. A sinkhole is a typical karst natural phenomena and is a depression or hole in the ground caused by some form of collapse of the surface layer. Podstenice sinkhole measures 160 meters in diameter, 60 meters in depth and has a volume of 665 cubic meters. At the bottom part of the sinkhole cold air lingers, which is a product of a temperature switch due to inflow of cold air from underground crack system.
Podstenice sinkhole is protected as a natural heritage site and also a woodland reserve, so visitors can look at it from the brink only.