Bathers at The Blue Lagoon beside the Svartsengi Power Station, using geothermal power and a place to swim.

The Blue Lagoon, one of Iceland's most important tourist attractions. Geothermal water that has already generated electricity at the Svartsengi Power Station and has passed through a heat exchanger to provide heat for a municipal water heating system is finally fed into the lagoon. The water,s high silica content keeps it from leaching into the lava field and gives it an appealing aqua tint.