winter view of park near postojna cave slovenia

architecture beautiful bright cave day destination holidays jama karst mountain nice outdoor postojna postojnska sightseeing slovenia snow system travel trip underworld vacations view white winter tourists environment geology attraction attractive europe landmark landscape visiting country top tourist february site season traditional tourism sunny tour excursion underground scenery nature natural vacation pivka river planina unica confluence subterranean confluences valley cold weather trees park birds bird duck wild flowing flow shore banks town walkway wooden hut cottage resort slope hills mountain