Jáchymov in Czech. The mine was named after the spa near it. A beautiful area. Not from from Carlsbad. Communists turned the town into a slave labor camp to operate the mine. It was really a death camp. Average age of death was around 45.
Joachimsthal mines were also famous for their silver. The coins produced there were called “Thalers” auf Deutsch, pronounced “tallers”, with an a as in alley, they were called “dollars” in English, cf. Marlowe’s Faust. (Thal is German for valley, roughly equivalent to dale in English.)