Ijen is a volcano located on East Java, Indonesia. It is inside a larger caldera Ijen, which is about 20 kilometers wide. inside the crater of the volcano there is a one-kilometer-wide cyan colored acidic lake. The lake is the site of a sulfur mining operation, in which sulfur-laden baskets are carried by hand from the crater floor. The active crater at Ijen has a diameter of 722 meters and a surface area of 0.41 square kilometers. It is 200 meters deep and has a volume of 36 cubic hectometers
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nice capture.
Thanks