the area include Oulankajoki, Kitkajoki, Kuusinkijoki and Pistojoki flowing eastward to the White Sea and Iijoki westward to the Gulf of Bothnia.
The 270 km (100 sq mi) area of Oulanka National Park is shared between northern Kuusamo and neighboring Salla municipality. The landscape is dominated by pine forests, Oulankajoki river and its side branches with their sandbanks and rapids, and in the northern part vast marsh areas. In the wilderness live 30 species of mammals and 120 species of birds, including brown, stone and white-tailed eagle. Wolves and lynxes are rare. Rapids in Oulankajoki include Kiutaköngäs, Taivalköngäs, Jyrävä, Niskakoski and Myllykoski. Near the southern border with Suomussalmi is the canyon lake Julma Ölkky with up to 50 m (160 ft) high cliffs
