The picturesque source of the river Krupa is located under a 30-metres-high rock cliff and is regarded as the most watery source in the Bela Krajina region. The river falls down over the waterfall and then runs into the river Lahinja. It is one of the most important Slovenian karst sources. There use to be four mills and saws located on the river in the past. The river bed is somewhere formed as a canyon. There are interesting ruins of an old castle in the vicinity.