The project replaces the current bathing facilities at Lake Mývatn that have been damaged with a new geothermal bathing complex. Positioned beside the existing lagoon, the architecture is conceived as an extension of the terrain, where natural rock formations and geothermal features shape both the buildings and the bathing experience.

The complex includes geothermal lagoons, steam baths, changing facilities, and visitor amenities organized around the bathing landscape. Reception, retail, and restaurant spaces are in a central arrival hall, while the lagoon and bathing areas extend outward into the surrounding terrain.

Geology is central to the design. Lava formations uncovered during construction are preserved and integrated directly into the architecture, allowing the building to emerge from the material conditions of the site. During construction, a previously unknown lava cave was discovered beneath the building. The 105-metre lava channel, containing rare crystalline formations created by geothermal activity, has since been protected and informs elements of the architectural language. Volcanic rock appears throughout as exposed surfaces, terrazzo flooring, textured concrete, and canopies.

The lagoon is shaped to protect delicate geological formations, allowing guests to move through milky-blue geothermal water within a rugged volcanic setting. Cave-like steam baths, fed by natural steam from the ground, are discreetly embedded in the landscape, while two swim-up bars define the more social areas with views across Lake Mývatn and the surrounding landscape.

Changing areas are organized into three zones accommodating up to six hundred guests. The lava changing rooms incorporate exposed rock surfaces extending into the interior. The showers are open and communal as in the traditional Icelandic bathhouses and swimming pools. The largest changing rooms have a more refined character and privacy, catering for the needs of travellers from other cultures. Finally, separate VIP facilities offer fully private changing rooms and bathing environments.