Große Teufelsküche, Granite rock formation in Tirschenreuth, Germany

Große Teufelsküche is a stream valley south of Tirschenreuth in the Oberpfälzer Wald, near Pilmersreuth a. d. Straße, in a coniferous forest. Around a slow forest brook stand several granite blocks formed by wool-sack weathering, with feldspar inclusions up to 4 cm across. It is registered as geotope 377R019.

The granite blocks are the result of Wollsack weathering, a process in which jointed granite breaks down into rounded, stacked boulders. The Kleine Teufelsküche, where the rock is best exposed at the entrance, is registered as geotope 377R018 by the Bavarian State Office for the Environment, and the Große Teufelsküche as geotope 377R019.

The name Teufelsküche, "Devil's Kitchen", is a folk name for the stream valley; the sources record no legend of black masses, only the granite blocks. Visitors follow the Waldbach past the Kleine Teufelsküche, a geotope (377R018) where blocks crowd the stream for about 50 metres, then on to the Große Teufelsküche (377R019).

The Kleine Teufelsküche lies near the entrance by Pilmersreuth an der Straße, where the granite blocks are best exposed along roughly 50 metres of the stream. The Große Teufelsküche, geotope 377R019, is reached by continuing on foot through the coniferous forest south of Tirschenreuth. Paths follow the slowly flowing brook, and the ground beside it is uneven and often damp.

The Kleine Teufelsküche, about 50 metres of granite blocks piled in and around the stream, is separately recorded by the Bavarian Environment Agency as geotope 377R018; the Große Teufelsküche carries the number 377R019. The blocks are granite wool sacks, rounded boulders left by weathering along joints.