Rhineland-Palatinate is big on stones. The area around Idar-Oberstein on the river Nahe is a geological treasure trove known for its gemstones. The Eifel has a volcanic legacy to explore on geological trails to maar lakes and extinct volcano cones. Nature's gifts to the Westerwald are clay, basalt, bubbling thermal springs and dramatic rocky valleys. Slate gives the delightful Moselle, Ahr and Rhine valleys their distinctive greyish blue. Visitor mines and tunnels take you deep below the ground. If you want to feel your spirit soar, head for the cliffs near Dahn. The amazing wonders of Rhineland-Palatinate. You'll be in your element.