All Photos © Carsten Peter/National Geographic. Above: The lava at Nyiragongo is made of an alkali-rich volcanic rock; its unusual composition may be a factor in the lava’s fluidity.

Photographer Carsten Peter descended into the fiery center of Nyiragongo—an active volcano towering over a city of one million people in the Democratic Republic of the Congo—for the April issue of National Geographic magazine.  See Carsten and his team explore the depths of Nyiragongo in Man vs. Volcano on the National Geographic channel. To see more of Carsten Peter’s work click here.

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