the rakov skocjan natural education and hiking trail in the rakov skocjan valley rakek or notranjski regijski park rakov skocjan

attraction autumn background beautiful bridge cave cerknica collapse countryside creek crossing depression education environment europe fall famous field flood forest grass green hiking hole karst kras landmark landscape leaf limestone natural nature notranjska notranjski outdoor park path phenomena protected rakek rakov regijski regional rock scene scenery scenic sinkhole skocjan slovenia stone stream summer sump tourism trail travel tree underground valley wall water waterfall wood