The Teufelsfels (Devil Rock, 569.0 m), a natural monument, on the crest of the Lützelsoon, is the largest and most interesting of the four large quartzite buttes. It is situated between the villages of Schneppenbach, Bruschied and Hennweiler. Until the 1960s the rock could still be climbed using a fixed iron ladder. As a result of the weathering of the rock this was no longer possible from 1975, and the parish of Hennweiler contemplated the construction of an observation tower. The tower was finally built in 1984/85 on the initiative of the village chair, Heinrich Heimfahrt. As a result, the tower is also known locally as Langer Heinrich (Long Henry). The tower offers a unique 360 degree view over the Hunsrück, the thickly wooded heights of the Idar Forest, the Schwarzwalder Hochwald and the Soonwald as far as the Donnersberg in North Palatinate.