Notes: A narrow steep mountain valley in W-E direction made by river Učja. Almost a pristine wilderness with no inhabitants and a single road on the right bank of the river Učja high above the water stream. Passing the valley along the stream is a serious sport adventure, with several death accidents up to now. 100% forest up to about 1.400 m elevation with very few unmarked hunters trails. Alpine phytogeographical region extending from 300 m up to 1.660 m elevation peaks with sub-alpine flora. Calcareous bedrock.