Geysers are similar to volcanoes in that they owe their existence to Earth's internal heat. They are springs which shoot boiling water out at certain times. Geysers are only found in places where there was an active volcano not long before. The water enters the earth through a crack and becomes mineral water. Thus it reaches the level of rock. If the water goes a long way down, it heats up. The column of water, along with steam, is then shot out through a central channel. In this way a spectacular fountain is created. It is this which makes it famous. After each eruption, the process starts all over again.

Geysers can be found in three places: Iceland, New Zealand and the west of the United States, in Yellowstone National Park. The most famous geyser in the Park is 'Old Faithful'.

In Iceland the geyser water is pumped and channeled to Rekjavik, the capital, where it feeds all the central heating systems economically. This is how man can harness an elemental force for his own good.