Adrenaline Park is 2 mi (3.3 km) from central Osilnica, why not stop by during your stay. If you'd also like to explore some of the parks in Osilnica, head to Risnjak National Park and Risnjak National Park.
Sightseeing doesn't have to be expensive. For some things to do in Osilnica, explore and snap photos of landmarks like Ancient and Primeval Beech Forests of the Carpathians or Cabranka River.