Blue flames of burning sulfur: Ijen volcano in East Java has one of the most impressive sulfur deposits on earth. They are so hot that the sulfur often ignites - a mysterious display at night caught on camera.
Fuego volcano photos: One of Central America's most active volcanoes, Fuego in Guatemala is in near-permanent explosive eruption with intermittent phases of increasing activity that generate lava fountains, lava flows and pyroclastic flows.
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