Deildartunguhver Thermal Spring provides 48 gallons per second (180 liters per second) of 212-degree Fahrenheit (100 degree Celsius) water, making it the most powerful hot spring in Europe. Thanks to its power and temperature, the water from the hot spring is used for central heating in Borgarnes and Akranes. The pipeline that facilitates this stretches for 40 miles (64 kilometers), yet the water is still about 176 degrees Fahrenheit (80 degrees Celsius) by the time it reaches Akranes.
Steam from the thermal spring can be seen from the road, and it’s a quick and easy detour for travelers driving along the Ring Road. Keep an eye out for deer fern, a type of fern that grows nowhere else in Iceland.
Fifteen to twenty minutes should be sufficient for a visit to Deildartunguhver Thermal Spring.