Geysir

All the worlds spouting hot springs were named after the ‘Great Geysir’, which first began erupting in the 14^th century. Erruptions are caused when boiling water deep in the spring, trapped by cooler water on the surface, explodes and spews out everything above it. Up until a couple of years ago, as a celebration for Icelandic Independence Day, tones of soap flakes were poured into the Geysir, sufficiently lowering the temperature and surface tension of the water resulting in an eruption. This has now been deemed environmentally unsound and has been discontinued.

The Geysir’s eruption reaches a height of 90m. Unfortunately, it’s currently dormant. However, Old Faithful, a nearby geyser, is active and reaches a height of 35m. Eruptions occur every 3 to 5 minutes.