Salt Room is a franchise operation (there may be others) that have custom made rooms you sit in while they pump in air infused with salt. Consider it a room with and ocean but with a little more salt in the air. The info provided by them refers to the use of salt caves in Eastern Europe that we used for folks with allergies and asthma. Google Salt Room for more info.

I felt much less sputum after these treatments and could breathe clearly.