Radon is an inert form of radiation. There are places other than Jachymov which are known for their radon. There's a very famous place in Montana, USA where you go into a cave for a couple of hours each day. There are also places in Austria, Germany and Japan. Jachymov has the reputation of being the most effective because you soak in radon water and it directly comes in contact with the skin. The places like the one in Montana you breath in Radon gas. All have similiar anti-inflammatory properties. BTW I am still feeling better and better!
