Hi! I have recently received an offer from a Polish firm, manufacturing salt caves. I have made a research and visited a few salt-building related websites. I found out that some European nations (Poles, Latvians,etc) have been practicing salt treatment for several centuries. What I am certain about - products such as salt chambers are quite attractive in appearance, yet I have no idea whether their healing properties aren't farfetched. I was therefore qurious if anyone on the forum have heard anything about this issue and can provide me with any helpful info. All comments will be of paramount value to me as far as I intend to invest money in such facility.