The word geyser originated in Geysir, Iceland home to the highest and third highest geysers in the world. Old Faithful in Yellowstone is the second highest. While Old Faithful erupts once every 70 minutes or so, Strokkur (the Churn) goes off about every 5-10 minutes and reaches a height only a few feet shorter than Old Faithful. The highest geyser, the Great Geyser, can be seen in the background steaming, just to the left of the erupting geyser. It rarely erupts anymore as Icelanders for years would try to force an eruption on Iceland's Independence Day by throwing rocks into the vent, which over the course of time has had the opposite effect. When it does erupt it can reach a height of over 200 feet. Photo © copyright by Scott Fricke.