Oulanka National Park () is a national park in the Northern Ostrobothnia and Lapland regions of Finland, covering . The park was established in 1956 and was expanded in 1982 and 1989. It borders the Paanajärvi National Park in Russia. The first inhabitants in the area were Sami people from Lapland who lived here until the end of the 17th century, which was when they had to give way to Finnish settlers. Although hunting, fishing and later farming was the primary occupation of the people who lived there, today the most notable activity in Oulanka is tourism. From the 1930s, the Finnish Tourist Association kept boats on the river and renovated the wooden cabins found across the park for accommodation purposes. These cabins can be used free of charge by any hikers in the area, given that they follow some basic guidelines and rules regarding the state of the cabins, the wood supply, and protecting the surrounding nature. From 2002, Oulanka was the first of the two Finnish national parks which became part of World Wide Fund for Nature's PAN Parks, the other one being the Southwestern Archipelago National Park. Nature Oulanka National Park is a unique and versatile combination of northern, southern and eastern nature. The landscape is made up of pine forests, river valleys with sandy banks and rapids, and in the north of vast mires. It has a unique river ecosystem and is an example of untouched and unlogged boreal forest, close to the arctic circle, which is protected by World Wide Fund for Nature from intensive reindeer herding. The area is rich in animal and plant species, even endangered ones. Near the visitor's center is the Oulanka Research Center, which is part of the Thule Institute and was established in 1966 to facilitate research in biological and geological sciences. The research center also offers its facilities to visiting tourists or hikers, during the less busy seasons. Along with the rugged geography and the varied microclimates, the location of the park is also one of the main reasons for the great variety of plants and trees, with more than 500 vascular plant species in the area. There is an overlap between northern and southern species in terms of their distribution, and numerous species in the east of Finland have their westernmost outposts here. Oulanka has a nutrient-rich soil, which makes it ideal for the rare and demanding