In its mid stream between Hom hill and the former castle hill of Klevevž Radulja brook forms a picturesque breakthrough gorge with small waterfalls. Underneath the gorge the brook quietens down in a small accumulation of a former castle watermill. Under the rapids on the left bank there is a walled in warm spring Klevevška toplica (24,8 oC), on the other bank there are openings in the rock wall which lead to entrances to upper and lower Klevevž cave. Upper cave is over 100 metres long horizontal shaft, while the lower cave consists of a genuine labyrinth of submerged shafts in a cumulative length of 518 metres. In lower cave there is also a unique thermal spring (16 oC), in which endemic subterranean animals were discovered.
Tours: Location is not equipped for public visits, the only safe path leads to the thermal spring.
GPS Northing (N) : 45,9066
GPS Easting (E) : 15,2347