Geyser is a hot spring that erupts periodically, and up into the pillar of hot water and steam. Geysers are quite rare, because it takes a combination of unique geological conditions and climatic, which exists only in few locations in the world. Geyser's activity is caused by rainwater seeping into the ground until they hit a rock heated by magma. When geyser is filled, the top water cool, but because of the narrow canals, cooling water does not reach the lower layers. The cold water from the top click on the hot water below, like the lid of a pressure cooker, and allow the water reservoir to heat up beyond the boiling point while liquids. Eventually, the pressure near the bottom of the geyser comes to the point where it starts boiling. Steam bubbles rise to the top of the trenches. When these bubbles burst their way out through the geyser , some of the water skiers or splashes out, thus mitigating the canals and water weight, respectively, reducing the pressure on the lower layers. With this pressure id released, beyond the boiling point of water turns into steam, and burst wildly through the opening. Expanding foam produced by the steam and hot water sprayed out of a geyser. Eventually it cools off leaving water geyser below the boiling point and the eruption ends. Hot water underground begin to flow back into ditches geyser, and the cycle begins all over again.