Geysir
The Geysir geothermal area in the Haukadalur valley of South Iceland is one of the three main stops on the Golden Circle and home to the hot spring that gave the English language the word geyser. The Great Geysir has been erupting intermittently for thousands of years and at its peak could blast water up to 70 metres into the air — but it is now largely dormant, erupting unpredictably and rarely. Its neighbour Strokkur, whose name means the Churn, erupts reliably every 5 to 10 minutes to heights of 15 to 40 metres and is the reason visitors gather here. The wider geothermal field contains dozens of hot springs, bubbling mud pools, fumaroles, and smaller geysers, making it worth exploring beyond just waiting for Strokkur. The site is free to visit year-round.
The Hot Spring That Named All Geysers in Every Language, and Its Reliable Neighbour That Erupts Every Few Minutes
The word geyser entered the English language directly from the Icelandic name Geysir, which derives from the Old Norse verb geysa, meaning to gush or erupt. The Great Geysir has been documented erupting since at least the 13th century and was once among the most powerful geysers in the world, capable of sending boiling water 70 metres into the air. Activity at Geysir has been irregular throughout its recorded history, with long dormant periods and sudden revivals, often triggered by earthquakes that alter the underground plumbing. It was active in the early 20th century and partially reactivated following earthquakes in 2000, but is currently mostly quiet. The Haukadalur valley where it sits is a high-temperature geothermal area sitting directly above the volcanic activity of the Mid-Atlantic Ridge, and the entire field around the geysers is dotted with hot springs, boiling mud pools, steaming vents, and mineral-stained ground in vivid reds, yellows, and greens.
Strokkur is the reliable performer at Geysir and the reason most visitors leave satisfied. Erupting every 5 to 10 minutes to heights of 15 to 40 metres depending on conditions, it builds visibly before each eruption: the surface of the water shimmers, then domes upward in a blue bubble of pressurised water before bursting upward in a column of steam and boiling water. The mechanism is a constricted underground channel that prevents water from circulating, allowing it to superheat beyond its normal boiling point until pressure forces it to the surface. The eruption lasts only seconds but is dramatic enough that visitors routinely wait through multiple cycles for the best photograph. The viewing area around Strokkur is roped off to maintain a safe distance. Visitors should stand to the side of the prevailing wind rather than directly downwind, as the fallout of hot water and steam can be significant.
The Geysir geothermal area is on Route 35 in Haukadalur, about 100 kilometres from Reykjavík and an hour and a half by car. It is free to enter and open year-round. A hotel, restaurant, café, and gift shop are located immediately adjacent to the site. Gullfoss waterfall is about 10 kilometres north along Route 35, making the two sites a natural combined stop. Þingvellir National Park completes the classic Golden Circle circuit about 50 kilometres southwest of Geysir. The site can become very busy with tour buses during peak summer hours; mid-morning and late afternoon are generally quieter. Strokkur erupts regardless of season and the steam plume is particularly photogenic in cold weather when it contrasts with a clear winter sky.
