Depicts the entrance and interior of the Aggtelek stalactite cave (Baradla cave). Encircling the outer edge is the inscription "The caves of the Aggtelek Karst."

The Aggtelek Karst spans about 1200 km², bordered by the Sajó and Torna streams to the west, north, and south, and the Bodva valleys to the east and southeast. Within this karst lies the Baradla-Domica Cave System, also known as the Baradla Cave, Hungary's largest and most renowned stalactite cave system. With mapped passages extending 24 km so far, it boasts colossal chambers reaching nearly 50 meters in height, adorned with stunning stalactite formations, including the "Lebanon Hall" and "Giants' Hall" in Jósvafő, which showcase impressive quantities of red and orange crystalline stalactites unmatched by any other cave.

Exploring the Baradla Cave is an ongoing endeavor, requiring at least 5 days to cover all known parts. Tourist trails offer access to major attractions with paved paths and lighting, including boating sections in some areas. Functioning as a vast underground river valley system, the Baradla collects karst waters seeping into the limestone plateau, with minimal live water flow for most of the year. Its age, estimated at approximately one and a half to two million years, is based on findings within the cave system.

Depicts a stylized flying bat. Below the bat, in the center, horizontally arranged rows contain the denomination and the designer's privy mark. The country name, the issuance year, and the mint mark are located in a circular inscription along the edge.