This a photo I took at the top of Mt. Aso when I was staying in Japan last year. Its the most active volcano in Japan and one of the largest in the world. I was staying just down the road from it in a place called Aso-mura (I think
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While it contains water, the funny colour is due not due to minerals dissolved in it but is somehow due to the fact that the water underneath is boiling up through the colder water at the top which gives it the deep turquoise. There are better photos of it around but this one is special because I took it.
