Are you a "rock hound?" I suggest that Telki Banya would make for a leisurely day trip in Tokaj mountain country. I first heard of Telki Banya years ago in genealogy archival documents. I suspected I might have ancestors who lived there and research proved I was right, though the old handwritten records for the Protestant Church were both difficult to read and (surprise!) had been transcribed in the FamilySearch genealogy database! (The ancestors moved and became Roman Catholics along the way.) Telki Banya translates to Good Mine and I was intrigued to know that gold and silver had been mined there since the Medieval period. Years ago there wasn't much on the Internet about the little town. There is much more now. I was next amazed to learn that there are surface minerals and gem stones, especially opals! It seems there are so very many varieties of gemstones and crystals to be found in the area this place has true geological educational value. The reason why? Ancient volcanos. You can still see lava domes and other evidence above ground.
This beautiful video is a delight to watch:
Mineral tours are organized locally. Gyepű Hill primarily offers amethysts, smoky quartz and mountain crystals, Kánya Hill is known for its amethysts, smoky quartz, mountain crystals, and a pseudomorphosis of quartz after calcite. Sinta Hill is the place for the most beautiful mountain crystals but agates can also be found. White Hill (Fehér-hegy) holds geodes, the Ósva Valley varieties of opals.