This area is called "La Bocca Grande", it's the largest fumarola in the Solfatara. Traces of rare red arsenic sulphur crystals called "Realgar" can be found here.
"Nella Fangaia" area, it is fed by innumerable small fumarole and spa water and natural mud, which boils at 140C
This machine was used to jar mud for beauty treatments...they still sell the stuff.
Bean
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