and stretches more or less southwards from Siegen and Burbach, southwestwards from Haiger, northwestwards from Weilburg, northwards from Limburg an der Lahn, northeastwards from Koblenz, eastwards from Linz am Rhein, southeastwards from Wissen and southwards from Betzdorf. In its centre lie Bad Marienberg and Hachenburg. Clockwise, the Westerwald is bordered by the following river valleys: the Rhine between Koblenz and Linz, the Sieg as far as Betzdorf, the Heller, the Dill and from its mouth near Wetzlar, the Lahn up to Lahnstein. Geomorphologically, the Westerwald belongs to the Rhenish Massif, which forms the greater part of that range's eastern half on the Rhine's right bank. Likewise, the Gladenbach Uplands, lying east of the Dill, also belong to the Westerwald, whereas the mountains reaching up to near the Haiger Saddle () and east of Siegen are counted as part of the Rothaargebirge. The Westerwald's regions The Westerwald is divided by elevation into these three regions: Unterer or Vorderer Westerwald, or Vorderwesterwald: Translated here as Lower Westerwald, this region borders on the Rhine and Lahn river valley landscapes and manifests itself as the western and southwestern part of the Westerwald, a heavily truncated upland with elevations ranging from 200 to 400 m. The subsidence areas found within (Dierdorfer Senke, Montabaurer Senke) are known for their clay deposits. Indeed, the name for this small region is the Kannenbäckerland, or "Jug Bakers’ Land", a reference to the traditional ceramics industry here. In the southwest, in the richly wooded Montabaur Heights (Montabaurer Höhe) is found a monadnock made of quartzite, as well as the Malberg Conservation Area (Naturschutzgebiet Malberg). The Siebengebirge joining the range in the northwest near Bonn (reaching 464 m) is, however, regionally grouped with the Middle Rhine area. Oberer Westerwald: Translated here as Upper Westerwald, this is a partly wooded land of volcanic crests with major basalt layers, above all in the area of the Westerwald Lake Plateau (Westerwälder Seenplatte), with elevations ranging from some 350 to 500 m. To the south, as part of the Lahn valley, the hilly Limburg Basin abuts the Upper Westerwald. Hoher Westerwald: The High Westerwald is an undulating and basalt-rich tableland decked with woodlands, making for a highly moderated microclimate, especially against extreme warmth. It ranges from roughly 450 to 657 m in height. Here is found the Fuchskaute, the highest peak. Places District seats in the Westerwald are: Altenkirchen (Altenkirchen district), Montabaur (Westerwaldkreis) and Neuwied