As you all know Herbert W. Franke not only is one of the most famous German science fiction authors but moreover a computer graphics pioneer as well as active in future studies and a speleologist (caving). Here you can see him (3rd from rh side) celebrating the 100th anniversary of DACHSTEIN CAVES in Obertraun, Austria. Since 1914 about 10 million people visited the ice caves of which 280 km have been investigated.
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