Kursiu Nerija National Park is one of the five national parks in Lithuania. It was established in 1991 to protect the unique ecosystems of the Curonian Spit and Curonian Lagoon. Kursiu Nerija National Park is protected by the state, under the Lithuanian law of Protected Areas. Since 1997 it is a member of EUROPARC federation. The Park has Category II in the classification of the World Conservation Union .