Fell Exhibition Slate Mine

The Fell Exhibition Slate Mine, also known as the Barbara-Hoffnung Exhibition Mine, is a former slate mine in Germany located about 20km east of Trier and about 60km east of Luxembourg City near the villages of Fell and Thomm. The exhibition mine is open to visitors every day from April to October. It consists of two roof slate mines from the early 20th century that are situated one above the other, a slate mining trail, and a mining museum.

Source: Wikipedia