Hilarius in Helmeringhausen
Entrance to the “Hilarius” tunnel in Helmeringhausen.
September 2007 (Hans Martin Köster)
#Olsberg #Helmeringhausen #Hilarius #Mining #Cooling #History #Bergbau #Kuehlung #Geschichte #Sauerland #Hochsauerland #Stollen #tunnel #Eingang #entrance #door #doorsday