I recently tried out a dry salt therapy session and I feel like you definitely need to experience one for yourself at some point.
If it's unclear what this is - the best way that I can describe it is that you enter a room, lay down on a massage table and breathe in the Himalayan salt air that's being circulated in the room. At first it seems as though nothing is really happening since it's so subtle, but if you lick your lips at all during the process, you'll taste the salt that you're breathing in. It's a 45 minute process and by the end of it, you're left with this tingling feeling inside. It's hard to describe, but it was as though I felt that I could breathe deeper afterward.
If you come across a spa that offers it, you have to try it. And if you find yourself in West Palm Beach, definitely check this place out.