Blue flamed molten sulphur - Kawah Ijen by Reuben Wu (via http://flic.kr/p/y69BCR )
Blue flamed molten sulphur - Kawah Ijen by Reuben Wu (via http://flic.kr/p/y69BCR )
Blue flamed molten sulphur - Kawah Ijen by Reuben Wu (via http://flic.kr/p/y69BCR )