in addition to the attractions listed below, other things to see in and around gerolstein include the dried-up maar called "papenkaule"; the buchenloch, a 36-metre-long karst cave that served as a dwelling for stone age people; the "mühlsteinhöhlen" ("millstone caves") or "eishöhlen" ("ice caves") near roth; a natural history museum; and a district local history museum. in walking distance is the "gerolsteiner dolomiten", a devonian limestone reef formed by extinct rugosa, tabulata, and stromatoporoids, comprising the hustley, the munterley, and the auber, which dominate the surrounding landscape, looming 100 meters above the valley.