Not far from Okučani, in the extreme west of the county, there is the locality Muški bunar, where there is a protected hundred-year-old hornbeam forest. The value of the Male Well was recognized as early as 1929, when the forest was declared a special forest vegetation reserve. With an area of 43 ha, it also belongs to the forest area of Gradiska. There is a mix of oak forest (26 ha) and mountain beech forest. The average age of the trees is 250 to 300 years.