The purpose of the regional park is to preserve the system of the great loops of the Nemunas - Punia, Balbieriškis, Prienai and Birštonas - the structure of the Nemunas, Verknė, natural stream valleys with unique ravines, dunes, ridges, outcrops, the unique larch forest of Degsnė; Punia mound with the remains of an ancient settlement and Pelekoniai - Dambava mound complexes, Birštonas resort and Nemajūnai urban complexes, Narava and Siponiai village landscape complexes and other cultural heritage values.