Papuk Nature Park covers the largest part of Mount Papuk (953 m asl) and partly Mount Krndija (790 m asl). These mountains are part of the Slavonian mountain range, which occupies the central geographical position in the Pannonian, flat region of Croatia. This geologically very diverse area (metamorphic rocks, granites, different types of schists, carbonates, dolomites) is home to 1223 species and subspecies of vascular flora. Most of the area is covered by various types of oak and beech forests.
Kopački Rit is located northwest of the confluence of the Drava and the Danube Rivers. It comprises many backwaters and ponds along the Danube. It is one of the most important, largest and most attractive preserved intact wetlands in Europe.