Aggtelek National Park, as a biosphere reservation, is protected by international agreements, and is part of World Heritage. There are over 240 caves that have been mapped under the hilly surface full of earth mounds, ancient furnaces, and ruins of monasteries. The most eastern range of the central northern mountain range in Hungary are the Zemplén Hills, covered by oak, beech, and pine forests.

Beech and oak forests cover the Bükk Hills, where there are 850 discovered caves. Three of them are open to the public: Anna-barlang and Szent lstván-barlang, rich in stalagmites and stalactites in Miskolc-Lillafüred, and Tavasbarlang in Miskolctapolca. The exceptionally charming Bükk Highlands, a forest-covered land streams, caves, and magnificent rock formations, with many native animal species is the third national park in Hungary. The most frequented spot of the region is the Szalajka Valley  full of wriggling trout.

The Zemplén Natural Preserve - with its villages, churches, castles - is one of our most colourful, most diverse protected areas. The gateway to the mountains is the town of Szerencs. There is a museum in the 13th century Rákóczi Castle, which displays a valuable exhibition of 825,000 postcards. From Szerencs a tour can be made into the Zemplén Hills. Strating out towards Abaújszántó, the imposing silhouette of the Castle of Boldogkő, built on an oval-shaped hill can be seen.