Warning Sign at Hot Creek near Mammoth Lakes (California).
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I read the sign and went for a bath, and i am still alive!
For more info about this location, go to en.wikipedia.org/wiki/Hot_Creek_(Mono_County,_California).
Hot Creek is located in the "Long Valley Caldera", the mouth of an old super volcano, a region with many hot springs. For more info about this region, go to: