The Externsteine is a distinctive sandstone rock formation located in the Teutoburg Forest, near the town of Horn-Bad Meinberg in the Lippe district of the German state of North Rhine-Westphalia.
The formation is a tor consisting of several tall, narrow columns of rock which rise abruptly from the surrounding wooded hills.
In a popular tradition going back to an idea proposed to Hermann Hamelmann in 1564, the Externsteine are identified as a sacred site of the pagan Saxons, and the location of the Irminsul idol reportedly destroyed by Charlemagne; there is however no archaeological evidence that would confirm the site's use during the relevant period.
Wikipedia https://en.wikipedia.org/wiki/Externsteine
Official Website https://www.externsteine-info.de/
Address (Unnamed Road), 32805, Germany
Coordinates 51°52'8.556" N 8°55'2.918" E