The Blue Lagoon is a geothermal bathing and wellness destination located within the lava fields of the Reykjanes peninsula in Iceland. Formed through geothermal energy production at nearby Svartsengi, the lagoon’s unique seawater is rich in silica, algae, and minerals that give the water its distinctive appearance and skin-nourishing qualities. Since opening, the Blue Lagoon has become one of Iceland’s most visited destinations and one of the world’s benchmark spa experiences.

The architectural design emphasizes the interaction between modern technology and the unique volcanic landscape. The buildings are carefully positioned along the edge of the Illahraun lava field, where natural lava formations embrace and shelter the lagoon. A man-made lava wall guides visitors through the main body of the building and extends outward to merge with the untouched lava edge surrounding the water. Concrete volumes lean toward the lava while lighter glazed spaces open toward the lagoon and natural light, creating a close relationship between interior spaces, water, and landscape.

Over time, the Blue Lagoon has evolved through multiple phases while maintaining the same architectural philosophy. New bathing areas, steam baths, saunas, treatment spaces, restaurants, hotels, and research facilities have gradually expanded into the lava field as part of a cohesive whole. The experience is shaped by the geothermal environment itself, where lava, steam, water, weather, and light become part of the architecture.

In recent years, volcanic activity on the Reykjanes peninsula has added a new dimension to the project. Since 2021, repeated eruptions near the site have reshaped the surrounding landscape and led to the construction of large protective earth walls around the Blue Lagoon and the adjacent Svartsengi power plant.

A new outdoor experience area opened in 2025 including a dry sauna, a cold pot and a swim-in steam bath. The expansion is the start of a larger expansion of the Blue Lagoon.

A new entrance, reception, and further expansion are now underway in response to both growing visitor numbers and changing geological conditions. The updated arrival sequence further strengthens the connection between guests and the landscape. Guests approach the entrance across overflow water from the lagoon via a so-called Moses bridge, while a feature wall covered with lava from recent eruptions draws the volcanic landscape directly into the welcome hall, allowing visitors to experience the forces of nature throughout their journey.