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The greatest acidic lake on earth: Ijen crater lake - Banyuwangi - East java - Indonesia
Ijen Plateau is Indonesia’s most famous crater and lies in East Java, 2,600 meters tall, topped with a caldera with the world’s largest lake of highly acid (pH<0.5) and mineralized volcanic water. The lake has an average depth of 176 meters at a height of 2,368 m. Perhaps Ijen crater lake is the most amazing Indonesian lake.