Visit the Strokkur geyser in Iceland.
Deep in the relatively thin crust of Iceland is water present. That water can be very hot there because it is close to the red-hot liquid Earth's core. Through natural channels can be done in places where the earth's crust is thin sometimes rise to a compound of the surface, as is the case with geysers. On the surface, the boiling point of water is normally at 100 ℃. The weight of the water above, the pressure on the subterranean water proportional to the depth. This allows the water at depth also has a higher boiling point than at the surface. The above water serves as it were as a lid, which ensures that the deeper water can not boil.

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