The most significant values of the national park are the special surface formations and caves in this limestone landscape.

The largest stalactite cave of Europe is situated in this area: the Baradla cave (26 km long, of which 8 km is in Slovakia, known under the name of Domica).

For example, the Peace Cave has a sanatorium which help treating people suffering from asthma.

It has been part of the UNESCO World Heritage since 1995 along with the Slovak Karst caves.

[1] Animals present in the Aggtelek National Park included the fire salamander, hucul pony, common buzzard, eastern imperial eagle, European copper skink, white-throated dipper, red deer, Eurasian lynx, gray wolf, wild boar, crested tit, goldcrest, Eurasian bullfinch, hazel grouse, common kingfisher, red-backed shrike, old World swallowtail, scarce swallowtail and the saga pedo.