In addition to many active volcanoes, Iceland is full of thermal features. In fact, it is home to the “original” geyser, a spout named “Geysir”. Geysir is not as active as it once was, but its neighbor, Strokkur, erupts reliably every 5 minutes or so, with varying intensity.
It’s a very popular stop along the Golden Circle, east of Reykjavik. Visitors can stand surprisingly close!