The Spanish firm estudioHerreros, which built the Munch Museum, now presents a floating sauna pavilion close to it. The Norwegian name Trosten refers to the thrush that migrates every year between Spain and the Nordic countries, the arrival of which, according to tradition, augurs good luck.

The program unfolds in the steam cabin, with its terrace giving direct access to the water, and an amphitheater facing the fiord, where small events can be held. The wheelchair-friendly facility incorporates an ambitious energy-saving system, ensuring constant warmth at all levels, with natural materials like certified wood, recycled and reused like the aluminum on the facades, and large terrazzo tiles manufactured under Green Label certification which provide thermal inertia. The scheme has an important experimental component, beginning with the assemblage of the timber structure on a dry dike outside the city before installing it on the floating concrete platform on which the enclosures and interiors were completed.