10-09-2019, 05:05 AM
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Senior Member
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Join Date: Mar 2017
Location: ABQ, New Mexico
Posts: 36,633
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Thanked 136,555 Times in 22,784 Posts
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Its milky turquoise waters may look inviting for a swim, but don’t jump in – this caldera, formed in the crater of the Kawah Ijen volcano, is the world’s largest acidic lake. The electric blue flames that burst into the air are a source of fascination, though (of course) there is a scientific explanation: high levels of sulfuric acid, which give the water its striking hue, combust when they hit the air.
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