During the Hadean Eon volcanoes played an integral part in the formation of the Earth. Even today volcanoes play a key role in the Earth's continued renewal of itself. Children and adults alike, it seems, are fascinated by these fountains of living.
Kawah Ijen volcano in Indonesia: "This blue glow, unusual for a volcano, isn't the lava itself, as unfortunately can be read on many websites. It is due to the combustion of sulfuric gases in contact with air temperatures above ~Smithsonian Magazine