Image: Ethiopia - The infernal glow of a lava lake in the Ertale volcano
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Ethiopia - The infernal glow of a lava lake in the Ertale volcano rivals moonrise over the Danakil Desert. Molten surface temperatures range from 550°F (260° Celsius) near the 262-foot-high (80 meters) walls to nearly 1000°F (538° Celsius) at the center of the pit. (Olivier Grunewald)
Source: National Geographic