The Národný park Slovenský kras (National Park of Slovenský kras) lies in the south of Slovakia next to the frontier with Hungary. The National Park covers an area of 346km² and its buffer zone 117km². The area was declared a protected landscape area in 1973 and the park was established on 01-MAR-2002. The karst area with a total size of 440km² largest karst area in middle Europe, with 1,100 caves listed in the cave registry. In 1995 the park was recognized as a UNESCO World Heritage Site, together with the adjoning Aggtelek Karst in Hungary. And it is listed as a UNESCO Biosphere Reserve.