We do have a salt mine over here which is well known for the remedy it offers for asthma and other respiratory problems. :)
But yeah, you definitely have to see that documentary. I've seen it for like 5 times already? And it always brings some tears in my eyes. You'll see why..
Wow, I am sure I will love it too, the trailer looked amazing. Will let you know soon ;)
Can't wait for it :)