http://news.bbcnewsd73hkzno2ini43t4gblxvycyac5aw4gnv7t2rccijh7745uqd.onion/2/hi/science/nature/4846574.stm
There are supposed benefits from the silica rich water with its faint smell of sulphur, and the white silica mud is exported for health and beauty treatments. Mr Albertsson told the BBC that he himself is a regular visitor. "For me, the ideal time to take a dip is in the middle of winter, in the middle of the night, looking up at the stars and the Aurora Borealis, the Northern Lights."