Volcanoes fascinate but spread fear and terror at the same time. They can devastate whole regions during a very short timeframe, but also provide the basis for new life. The lava emerging from a volcanic eruption gives rise to islands and creates mineral-rich soils where plants grow well. Thanks to these fertile soils, roughly half a billion people worldwide live in close proximity to active volcanoes. Many of them are well aware of the danger – but they take this risk in exchange for abundant crops and warm thermal water. Especially on Iceland and in Japan, bathing in hot springs is very popular. But not only the physical well-being benefits from the hot water, it is also being used for energy production.