Sunshine Radon Health Mine, Montana

An inactive mine which naturally emits radon gas, that has been developed into a healing center, with tables and chairs set up to accomodate visitors. The proprietors tout the cleansing effects of radon, and recommend 32 sessions in the mine every year for maximum benefits. Thousands make the pilgrimage to the half-dozen or so similar radon mines in the area, citing relief from arthritis and other ailments. People under the age of 18 and pregnant women are not allowed in the mine.