The national parks of South Korea are preserved parcels of public land on which most forms of development are prohibited. They cover a total of 6.6% of the country's area, and are typically located in mountainous or coastal regions. The country's largest mountain park is Jirisan National Park in the southwest; this was also the first national park to be designated in 1967. The largest marine park is Dadohaehaesang, with an area of more than 2,200 km2, but almost all of this is water. The smallest park is Wolchulsan, with an area of only 56.1 km2. There are currently 21 national parks in South Korea; the parks, with the exception of Hallasan National Park, are managed by the Korea National Park Service, established in 1987.