speleotherapy
n.β Β«Being sent to the salt mines was a fate worse than death for dissidents in the old Soviet Unionβnow theyβre being used to cure kids of asthma. Children are sent to Solotvino, Ukraine, to spend a few hours a day 900ft underground over a three-month period. The method known as speleotherapyβis not backed by scientists.Β» ββTake A Deep BreathβSalt Mine Is Asthma Cure” Daily Record (Glasgow, Scotland) Nov. 14, 2005. (source: Double-Tongued Dictionary)