Everyone knows what a geyser is, but do you know that it is named after a particular geyser named Geysir in the Haukadalur Valley east of Reykjavík, Iceland? Its situation is similar to that of Old Faithful in Yellowstone National Park. In their hurry to precipitate an eruption hordes of tourists over the years have poured detergents and other foreign substances into the holes and succeeded only in making the eruptions more sporadic and unpredictable.

Tourists still visit the area in great numbers in the various Golden Circle or Great Circle tours offered by coach lines. (These tours usually include Þingvellir National Park and the waterfall at Gullfoss, among others.) Instead of waiting for Geysir, they have the nearby frequent eruptions of Strokkur, “The Churn,” which sends a column of steam 15-40 meters high every 6-10 minutes.

Iceland has a number of these geothermal areas. Visiting them calls for a certain amount of care as a slight misstep can result in boiling your foot as the soil around your footprints starts to sink. Not all of these areas are carefully fenced; and tourists, being their usual irrepressible selves, have a tendency to risk a serious hotfoot.