World's most exclusive spa in Karlbad , 5,000 ft up in the mountains of Austria . It is exclusive because it is inaccessible except to the most determined , for it lies 10 miles from the nearest road. Stones are put into a furnace and kept there until red hot , then they are put into the wooden bath to heat the icy cold spring water in which the patient must lie for three hours 4th August 1951