Visit to Park of nature Velebit, Cerovac caves
Velebit (145 km) is the longest and the most interesting mountain in Croatia. Variety of natural wealth; forest and botanic resorts: "Hajducki i Rožanski kukovi", "Stirovaca", "Visibaba – Snow Drop" and "Botanic Garden"; "Cerovacke pecine - Cerovac Caves" with 3,5 km underground corridors, place of residence paleolitic and iron age men.
(Trip by car)
http://public.srce.hr/botanic/cise/doc/kopno/prot_areas/velebit.htm