The old tunnels in the Hunsrück make the region an important habitat for various species of bats. Here you'll find one of these tunnels, which can be lit outside of hibernation times so you can take a look inside.
The only gemstone mine in Europe offers a great insight into the mining of various gemstones in Idar-Oberstein. During a guided tour, you not only see the tunnels (and regularly …
Above, at the dream loop "Between the Forests" is an old slate mine. From the end of April to the end of September, it is illuminated, so that you can …