The Národný park Slovenský kras (National Park of Slovak Karst) lies in the south of Slovakia next to the frontier with Hungary. The National Park covers an area of 346 km² and its buffer zone 117 km². 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 440 km² is the 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.