On the trail of basalt we head to Hohenfels-Essingen. On a circular route we experience a cave labyrinth, created by the dismantling of the mills. The adventurous hike is also suitable for families with children and takes around 2 to 3 hours. Flashlights are desired. Hiking guide: Mathilde Weinandy Time: 1:00 p.m Location: 54595 Prüm, Rathausplatz, Tiergartenstraße 54 Costs: Free hike, shared car for a small fee www.eifelverein-pruem.de