Blue Lagoon - Iceland

The Blue Lagoon: Iceland's Iconic Geothermal Spa

Located on Iceland's Reykjanes Peninsula, the Blue Lagoon is one of the country's most famous geothermal attractions. Renowned for its striking milky blue waters, this world-famous spa combines dramatic volcanic landscapes with naturally heated, mineral-rich geothermal seawater to create an unforgettable bathing experience.

The geothermal water originates from depths of around 2,000 metres, where seawater and freshwater are superheated within the earth before being brought to the surface by geothermal energy. As the water rises, it becomes enriched with silica, algae and minerals, giving the lagoon its distinctive appearance and unique properties.

Bathing temperatures are typically maintained between 37°C and 40°C, providing a comfortable experience throughout the year, even during Iceland's harsh winters. The lagoon's vivid blue colour is created by the way tiny silica particles scatter and reflect sunlight, while microscopic algae can add subtle green tones during the brighter summer months.

Image by McKay Savage under Creative Commons License.

Although the lagoon appears brilliantly blue, the water itself is naturally milky white. Its famous colour is an optical effect created by the suspended silica interacting with daylight, making the Blue Lagoon one of the world's most photographed geothermal destinations.

Whether visiting beneath the midnight sun or surrounded by snow, the Blue Lagoon remains one of Iceland's most remarkable natural experiences, telling a unique story, beyond the postcard.

The Blue Lagoon was formed in 1976 during operations at the nearby Svartsengi Geothermal Power Plant. People soon discovered the mineral-rich geothermal water's soothing qualities, and public bathing began in the early 1980s. The first bathing facilities opened in 1987, and the Blue Lagoon has since evolved into one of Iceland's most celebrated wellness destinations.