The Blue Lagoon: A Geothermal Spa Born from an Industrial Accident, Now Iceland's Most Popular Attraction
The Blue Lagoon, located on the Reykjanes Peninsula in southwestern Iceland, is the most visited tourist destination in Iceland and one of the world's most stunning geothermal spas. However, its emergence was an unplanned happy accident. In 1976, Valur Margeirsson, an employee at the Svartsengi Geothermal Power Plant with psoriasis, enquired if he might swim in the warm geothermal water generated as a byproduct of power generation. The mineral-rich water greatly relieved his condition, prompting other psoriasis patients to try it, with similar astounding outcomes.
Initially, residents assumed the geothermal pool was toxic, and the lagoon presented serious concerns, including high temperatures and unpredictable depths ranging from 1 to 7 meters. Despite safety concerns, casual bathing grew more popular as word spread about its therapeutic effects. In the 1980s, tourism entrepreneurs recognised the Blue Lagoon's economic potential and transformed it into a managed destination with luxurious amenities. Today, it is a world-class wellness facility offering comfort, premium, and luxury package options. The water temperature remains consistent at 98-104°F (37-40°C) year-round, making it a year-round resort, even during Iceland's cold winters.
The Blue Lagoon's mineral-rich water has high levels of silica, sulphur, and algae, which have been shown to promote skin healing. The Blue Lagoon Clinic is an internationally recognised psoriasis treatment clinic, with rheumatologists and dermatologists exploring thermal water efficacy. Guests can use the complimentary white silica mud mask to create the iconic white-faced bather photos, which are well-known worldwide. The modern facilities offer restaurants, cafés, saunas, steam rooms, and unique stay packages at surrounding luxury hotels with direct lagoon access.
Advance appointment is required to visit the Blue Lagoon owing to limited daily availability. The lagoon is located 39 kilometres southwest of Reykjavik, about a 45-minute drive. The best times to visit are sunrise (fewer tourists) or sunset (for stunning lighting). The facility follows strict pre bathing shower protocol (needed before entering) and geothermal water safety rules (slow bathing, no excessive exercise). Visitors should bring swimsuits and water shoes as geothermal minerals might be slippery. The mix of man-made origin, medicinal powers, otherworldly look, and Icelandic nature produces a unique destination that combines industrial accident, natural resources, and tourism innovation.
