In a similar way the highest elevations of the historic Siegerland (such as the 678 m high Riemen) are not in the natural region of Siegerland (see major landscape units), but in the Rothaar Mountains. And the 633-metre-high Alte Burg lies geographically in the Siegerland, but is not the highest elevation of an independent ridge. Rather, it is part of the Siegerland Rothaar Foothills (Siegerländer Rothaar-Vorhöhen), which form the western slopes of the Rothaar Mountains.