The White Wall (German: Weiße Wall) in the Taunus is a quartzite field on the Altkönig that was formed in the ice age as a result of frost weathering. It lies at a maximum elevation of 634 m above sea level (NHN) near Oberursel in the Hessian county of Hochtaunuskreis in Germany. From the pass on the Kanonenstraße, which runs from Oberursel up to the Großer Feldberg, the rocky terrain looks like a stone quarry. In sunlight the rocks gleam white; hence the name of the debris field.