The forests of the Westerwald sit above the remnants of ancient volcanic activity, and the rolling landscape varies between hard basalt bedrock and tuff or limestone layers. The varied geology is responsible for the mineral wealth that was once extracted from the region but has also created numerous limestone and volcanic caverns. This hike takes you on a loop trail through the Kubacher crystal cavern, which is unique in Germany for its crystal stalagmites and stalactites. There is also a nearby castle, so the hike pays a visit to that as well.

How to Get Here:

• The hike starts and ends at the main station in Weilburg, which is reachable from Frankfurt or Koblenz.