The Blue Lagoon geothermal spa is one of the most visited attractions in Iceland. The steamy waters are part of a lava formation.
The warm waters are rich in minerals like silica and sulphur and bathing in the Blue Lagoon is reputed to help some people suffering from skin diseases such as psoriasis. The water temperature in the bathing and swimming area of the lagoon averages 37-39 °C (98-102 °F). The Blue Lagoon also operates a Research and Development facility to help find cures for other skin ailments using the mineral rich water.
The lagoon is fed by the water output of the nearby geothermal power plant Svartsengi and is renewed every 2 days. Superheated water is vented from the ground near a lava flow and used to run turbines that generate electricity. After going through the turbines, the steam and hot water passes through a heat exchanger to provide heat for a municipal hot water heating system. Then the water is fed into the lagoon for recreational and medicinal users to bathe in.
The spa is located in a lava field in Grindavík on the Reykjanes Peninsula, southwestern Iceland. Situated approximately 13km (8 miles) from the Keflavík International Airport and 39km (24 miles) from the capital city of Reykjavík. That is roughly a 20 minute drive from the airport and a 40 minute drive from Reykjavík. The Blue Lagoon spa and geothermal complex is clearly visible from any of the usual satellite imagery.
Iceland has a strict code of hygiene and guests are required to shower without clothing in the communal shower area before and after bathing.
The Blue Lagoon was used as the pit stop for the first leg of The Amazing Race 6. The Blue Lagoon was used for the thermal spa scenes in the filming of Hostel: Part II. It was also shown in the Incubus documentary Look Alive, when the band visited Iceland.