If you look at any tour book on Iceland or try to get on a local day tour, the most popular attraction you will find is called Golden Circle. It is a term to describe the 3 major attractions in southern Iceland: Gullfoss (a big waterfall), Þingvellir (a National Park) and Geysir. Geysir is the subject of this post.
Geysir actually has two meanings. From a broader perspective, it refers to the geyser area around the Haukadalur Valley in southern Iceland which contains many different geysers (the word geyser actually derives from Geysir). In a narrower sense, it actually refers to one of the biggest geysers in area. It is also called Great Geysir.
Ironically, most of the eruption pictures (including this one) that you see are actually not Geysir (the narrow meaning). The reason is it erupts very very infrequently and one needs to be lucky to see it. Most of the pictures were taken at the geyser nearby called Strokkur, which erupts every few minutes. Capturing its eruption was a very interesting experience: I needed to wait and then suddenly a small water sphere appeared at the vent. It then bursted and the water and steam jet shot up – all in a matter of seconds. A great continuous shooting mode is invaluable here.