Burning sulfur forms lava-like rivers of light at Indonesia's Kawah Ijen volcano and other craters.
Indonesia's Kawah Ijen and other craters emit rivers of light from burning sulfur.
Watch: Stunning Electric-Blue Flames Erupt From Volcano In
Stunning Electric-Blue Flames Erupt From Volcanoes
Blue Lava Ijen volcano
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Stunning sunrise over the Ijen volcano with the beautiful
Indonesia's Must-See Volcanoes
Dramatické fotografie Oliviera Grunewalda předvádějí modré plameny - ne modrou lávu - která je výsledkem spalování síry
Real Lava in Volcano
A Guide to Hiking Indonesia's Blue Flame Volcano: Kawah Ijen