Vranja jama v1.0

Vranja Cave is another karst spring that feeds the Cerknica Lake at high water. The cave is closed to the public because of one peculiarity. When the temperatures drop in the fall, the frogs from the surrounding area move to the cave and hibernate there at milder and constant temperatures, which is unique event globally. It is because of this migration that entry into the cave is only possible with the permission from ARSO (Slovenian Environment Agency). We used the warm part of the year to explore this cave. Years ago, divers made their way into this cave, but were stopped by a very unfriendly restriction in the opening meters. Fortunately, after that, the cave opens and continues deeper. Even in the summer one can encounter a couple of frogs and tadpoles in the cave.