The famous geyser in Iceland. As seen in the video, a Geyser is made up of steam and hot water (around boiling point and above) that is ejected from a cavity within the earths surface. This cavity is connected to an underground water system that has its own plumbing which lies close to heat source within the earths crust such as a magma chamber. The water is heated and eventually ejected out of the cavity every so often creating this spectacular feature which can reach heights up to 70 meters. T