The incredible volcano with blue 'lava' that has become a dark tourism haven
A truly remarkable quirk of the natural world - this volcano lights up the night sky in an iridescent blue when its sulphuric ...
National Geographic news6 年
A Look Inside One of Earth’s Most Dramatic Volcanoes
When you’re in the mine, the sky is covered by gases. Day and night are confused. You feel suspended in time. Sunarto, 41 years old, carries a load of sulfur out of the Kawah Ijen crater.