The area of Slovak opal mines with a parking lot is located right next to the road between the villages of Zlatá Baňa and Červenica in the Slanské vrchy, only about 20 km from Prešov. It is approximately 23 km from the Košice side. The road is marked with official signs. If you use Google maps for help, enter “Portál štôlne Jozef” into them. The place is precisely marked.