The Drenovec stream flows through the rocky overpasses and the Drenovec waterfall in the cave of Ledenica, into the torrential Dobrnica. It is a living example of the rich water wealth of Dobrna and its surroundings, but of course this does not apply to the dry season. In the special guide, Paths of Dobrna, it even says that the area of the Drenovec stream is rich with mushrooms.