Salt Mine Sanatorium
A former salt mine in Ukraine, 300 metres below the surface, offers asthma and allergy sufferers what medicine cannot: relief. The starkly lit tunnels of the mine wind their way through a crust of underground mineral deposits. The air in these seemingly interminable subterranean passageways is replete with the salt particles once mined by workers. One might think the air in such a place would be harsh on the lungs of those miners but not so: the salt mine in fact has remarkable curative properties.
http://1800recycling.com/2010/10/curative-powers-ukraine-repurposed-salt/

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