The famous blue flames coming from Kawah Ijen in Java, Indonesia, one of the largest acidic lakes in the world. Photo: Nam Cheah

Hiking an active Indonesian volcano: how to trek through the blue flames of Kawah Ijen

  • One of the largest acidic lakes in the world, Kawah Ijen, in the crater of a volcano where sulphur miners toil, is famous for its natural blue flames
  • They occur when escaping sulphur gases come into contact with the oxygen in the atmosphere
Topic |   Asia travel

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The famous blue flames coming from Kawah Ijen in Java, Indonesia, one of the largest acidic lakes in the world. Photo: Nam Cheah
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