Eye candy: Kawah Ijen, the volcano with blue lava
Tuesday, September 16, 2014, 2:16 PM - The work of French photographer Olivier Grunewald has brought a renewed attention to Indonesia's stunning Kawah Ijen volcano, which spills blue lava across the land at night.
The mountain is largely made up of sulphur, which causes the lava to burn blue.
The lavender liquid burns at about 115C, and the environment is incredibly toxic due to the burning fumes.
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Grunewald and Régis Etienne, head of Geneva's Society of Volcanology, recently braved the harsh conditions to capture footage for an upcoming documentary. You can watch the trailer online.
In the meantime, check out these incredible images of the Kawah Ijen volcano.