Blue Lagoon

The Blue Lagoon is not a natural lake. Its milky-blue, mineral-rich water is the outflow of the Svartsengi geothermal plant next door, held at 37–40°C whatever the weather. The white silica that tints the water settles on the floor, and staff scoop it up for the spa's signature face mask. Around the pools there is only black lava, drifting steam and the slopes of Mount Þorbjörn, five kilometres from Grindavík.