Keywords: RakovSkocjan3.jpg Rakov Škocjan natural park in Slovenia guided tour to Zelška jama Karst river with Karst spring collapsed dolines and Ponor large cave sinkhole in Inner Carniola photo Ziga 18 46 7 April 2007 UTC 2007-04-07 own assumed Žiga Rak Škocjan Natural arches in Slovenia Sinkholes Karst springs in Slovenia Rak creek |