Faultings, different layer slopes, crushed rocks and mineral sources tell us about the intensive tectonics in the Kalnik hills.
The biggest part of Kalnik is covered in decidous forests. There aren't any natural pinewoods, apart from the fragmentary planted pinewood.
This area has a big floristic importance because of the presence of certain Mediterranean, Illyrian, Pontian and Alpine plants.
The most beautiful parts of Kalnik's nature can be experienced by following the Educational path.
The remains of the Mali Kalnik and Veliki Kalnik forts, built in the 13th century, complete the value and landscape diversity of Kalnik with its esthetic, cultual, historical and touristic meaning.