Orljava springs below the peaks of Psunj at 800 m above sea level and is the largest river in the Požega valley, which collects all the waters of the mountain streams of the Požega region to the confluence with the Sava near Slavonski Kobaš.
The length of the stream is about 90 km, in the lower course of which the original lowland forests of willows and poplars, which are included in the ecological network Natura 2000, have been partially preserved.
The park in Pleternica has a square shape of 1 ha. It is mentioned as a remnant of a former park next to the old castle and outbuildings around it. Today, it is dominated by about 20 species of domestic and foreign trees.