To work in a mine near a volcano has to be the filthiest job ever, maybe considered as one of the worst. Photographer Oliver Grunewald took several stunning photos of the sulfur mines in the crater of the volcano Kawah Ijen that is located in East Java, Indonesia. Volcanos are known for being unpredictable, and it is quite a risk to work at a place like this, but there are people that is actually doing it for a living.

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The photos show some really amazing colors of the volcano and the lava, almost so you can feel the heat. It looks like the most tough job, so hats down for the mine workers. Speaking of mines, this is the largest hole that humans dug; the Kimberley Mine.

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