A tour to Donnerbach Siphon, Hirlatz H?hle
Dates: Wednesday 31st October, Sunday 4th November
Present: Wetti Wielander, Peter Hu ?bner, Katharina Bitzer, Georg Bitzer,
Tanguy Racine
Aim: To support a diving excursion to the Donnerbach Siphon, to survey two canyons in the vicinity of Pendler...