In addition to arable land and abundant water resources, the natural assets of the municipality of Kostajnica include forests, particularly the cultivated chestnut forests covering an area of 550 hectares.
It is precisely because of this that the chestnut forests of
Kostajnica are the most significant chestnut complex in Republika Srpska.
The total forest area in this local community amounts to
3,847 hectares.
According to data from the Study of Integrated Rural
Development of this municipality, forest vegetation in Kostajnica mainly
consists of cultivated chestnut forests, beech, and oak forests.