Kampinos National Park (Polish: Kampinoski Park Narodowy) is a National Park in central Poland, in Masovian Voivodeship, on the north-west outskirts of Warsaw. The park was created in 1959. It covers the ancient Kampinos Forest (Puszcza Kampinoska), and in January 2000 the area was added to UNESCO's list of biosphere reserves. The Park is now slightly smaller than originally, covering 385.44 square kilometres (148.82 sq mi), of which 46.38 km? is strictly protected. The protective zone around the Park covers 377.56 km?. Forests account for around 70% of the park's area, and most the common tree is the pine. Kampinoski National Park is located at the biggest river junction in Poland - here valleys of Vistula, Bug, Narew, Wkra and Bzura meet together. There are no lakes, the biggest river of the Park is the Łasica, a tributary to the Bzura, which acts as a water canal. Park?s flora is rich with around 1245 species of plants, of which 69 are protected. Park's landscape is a mix of sand dunes and swamp lands with pine trees growing on sand and meadows on swamps.