The Westerwald (German pronunciation: [ˈvɛstɐvalt]; literally ‚Western Forest‘) is a low mountain range on the right bank of the River Rhine in the German federal states of Rhineland-Palatinate, Hesse and North Rhine-Westphalia. It is a part of the Rhine Massif (Rheinisches Schiefergebirge or Rhenish Slate Mountains). Its highest elevation, at 657 m above sea level, is the Fuchskaute in the High Westerwald.
Tourist attractions include the Dornburg (394 metres), site of some Celtic ruins from La Tène times (5th to 1st century BC), found in the community of the same name, and Limburg an der Lahn, a town with a mediaeval centre.
The geologically old, heavily eroded range of the Westerwald is in its northern parts overlaid by a volcanic upland made of Neogene basalt layers. It covers an area of some 50 × 70 km, and thereby roughly 3 000 km², making the Westerwald one of Germany’s biggest mountain ranges by area. In areas of subsidence, it has in its flatter western part (Lower Westerwald)…