MARTIN RIETZE / SCIENCE PHOTO LIBRARY MARTIN RIETZE / SCIENCE PHOTO LIBRARY
Mount Nyiragongo lava lake. Pattern of cracks on the surface of the lava lake at the summit of Mount Nyiragongo. This active stratovolcano (elevation of 3470 metres) is in the Virunga Mountains of the Democratic Republic of the Congo. Photographed in January 2011.
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