limestone rocks and karst mountain landscape - northern velebit national park, croatia (vapnenacke stijene)

limestone rocks karst mountain landscape northern velebit national park croatia vapnenacke stijene krski planinski krajolik nacionalni sjeverni hrvatska nature travel landscape outdoor mountain scenery view hiking scenic beautiful rock peak europe environment tourism forest hill natural tree vacation background rocky panorama stone hike scene adventure climbing cliff wilderness destination outdoors trail spring high climb snowy mountains wood valley country viewpoint rocks panoramic famous season fir explore path trekking