The 28341 hectares area comprising the majority of the Zemplén-mountains became protected in 1984. Its rocks did rise 14-16 million years ao, during volcanism. The sea periodically surrounded the volcanic area, leaving sediments here. The volcanic tufa The mountains of this protected area are covered by Oak forestek, Querco-petraeae-Carpinetum Oak forests and Melliti-Fagetum and Aconito-Fagetum beech forests, the valleys of the brooks are covered by Thelypterdi-Alnetum Alder forests. Herb flora of the mountains is very diverse, with Many common elements of the alpine flora from the Carpathian mountains. The habitats of the protected rarities are the montane hayfields, moors, Diantho-Seselrienthum rocksteppe associations the stands of beech forests with fern (Diphasium complanatum), and Bilberry (Vaccinium spp.) as well as stands of the White Birch (Betula pendula). The fauna is very diverse, with most protected mammal species of Hungary. Its bird fauna is characterised by the presence of alpine species, e.g. Black Stork (Ciconia nigra), birds of prey and all Owl species of Hungary.
Charachteristic (natural value): zoological value, botanical value, water habitat, Look-out tower, educational path, presentation house, memorial site