AtIndonesia’s Kawah Ijen volcano, a breathtaking blue glow emerges at night, setting it apart from most volcanoes where lava burns in shades of red. At Kawah Ijen, however, the molten sulfur flows ...

Molten lava looks almost otherworldly, glowing red and orange as it flows from Earth’s core toward the surface. While it might be mesmerizing from afar, stepping into it would be an unimaginable ...