After the Prussian government had banned traditional straw roofing in the 19th century because of the high risk of fire, roofing slate gained economic importance on the Strimmiger-Berg. The municipalities …
Only in the years 1921 to 1924 was the pit in operation, in which the oily roofing slate was mined. However, the oil content in this pit was too low. …
The way from the Kompus cap to the Castor cave or the Castor cross is no longer officially released. This part of the "boxwood hiking trail" used to be, but …
About the small pit are no historical records available. The drawings, like the globe, on the wall and on the ridge helped to name the astronomical cave.