The benefits of salt therapy or speleotherapy are well documented. In the mid 18th Century a Polish health official Felix Botchkowski noticed that the workers of salt mines did not get ill with lung diseases. He wrote a book about the effects of salt dust in 1843. His successor Mstislav Poljakowski founded a Salt Spa in Velicko near Krakow which is still in operation.
During the Second World War salt mines were often used as bombproof shelters. After spending time there many people who suffered from asthma felt that their health had improved!
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