Thousands of years of volcanic activity has caused a massive accumulation of methane and carbon dioxide to dissolve in the depths of Lake Kivu, enough to prove monumentally destructive if released.

Why it's incredible: The lake contains huge amounts of explosive carbon dioxide and methane. Lake Kivu is a giant body of water that is so saturated with carbon dioxide (CO2) and methane at its depths ...

Lake Kivu is framed by imposing cliffs, nestled within a verdant valley straddling Rwanda and the Democratic Republic of Congo. On the lake, fishermen float out in small boats, singing to time their ...