135K views · 5.5K reactions | Kawah Ijen: The blue fire volcano - What kind of fire burns blue in the dark? How can a lake be more acidic than battery acid? Deep inside Indonesia’s Kawah Ijen volcano, nature creates a spectacle few have ever witnessed. According to Geology.com, the glowing blue flames and acidic waters are real — and far more dangerous than they seem. But what lies beneath the surface of this volcanic giant? | The Brain Maze | Facebook