One of the main tourist atractions in Iceland is the famous geothermal spa complex called the Blue Lagoon. The water comes from a close geothermal plant at a temperature of 37-39°C / 98-102°F but originates 2000 meter/6562 ft beneath the ground where it is heated by earth’s natural forces. At that depth the temperature is 240°C/464°F. The composition of minerals in the water is very distinctive and has a high level of silica.
It´s very relaxing to hace a bath there, and in a foggy day is an amazing and magical experience!
Blue lagoon, Iceland. August 2011