Gallery Speleology in Bull Rock Cave
Günther Nouackh in diving suit 1913
Members of GfH sdVDT with new diving suit made by Westfalia(1913)
The engine room placed before Shenk's Siphon 1912
The engine room placed in The Enrance Hall 1920-1922
Cavers struggle with floods
Cavers struggle with floods
Cavers struggle with floods
Cavers struggle with floods