Kawah Ijen Volcano In East Java Indonesia Is Home To The Largest Acid Crater Lake On Earth Photographer Olivier Grunewald And Vulcanologist Regis Etienne Spend 30 Nights Here Capturing A Unique Volcanic Event Blue Flames Of Burning Molten Sulfur This Blue Fire As Natives Call It Can Rise To Five Meters This Inspiring Place Was Introduced To The World In The Imax Film Ring Of Fire
