To the east of Breinigerberg is the forest of Stolberg (part of the North Eifel Nature Park) and the Schlangenberg Nature Reserve which is famous for its calamine flora. The hill of Schlangenberg is 276 metres above sea level and originates in the former ore mine of Breinigerberg. Names like Bleiweg, which means Way of lead, even today, give hints to the history of the village. The calamine from the ore mine Breinigerberg was used exclusively in Stolberg for the production of brass.