We’ve grown accustomed to thinking about lava as a red hot substance erupting from volcanoes, which then oozes down the sides of mountains, eventually drying up and turning into sheets and chunks of porous black and red rock.
In contrast, the Kawah Ijen volcano in East Java, Indonesia spews forth something else entirely, shimmering blue sulfuric gas that pours down the mountain when it condenses into liquid.
This substance is so prized in the country that an entire industry of miners exist who risk their lives collecting the cooled sulfur, which turns into blocks of yellow rock.
Wearing only t-shirts and trousers, these Indonesian miners endure temperatures of up to 240F in order to gather these highly prized yellow rocks.
Watch the video to see this blue spectacle of flaming sulfur in action: