The volcanic activity on Munterley has had several eruptions, the most notable being the crater of Papenkaule. The volcanic crater is about 80 m wide and 20 m deep. Today, the Papenkaule is a top-class geo- and biotope.
Experience "The Eifel from below" all year round, every day! The family-friendly guided tours are especially designed for children, for whom a visit to the "underground world" is a very special experience! Guided tours of the former lead ore mine are offered three times a day for individual visitors.