Set within the dramatic landscape of Þjórsárdalur, the adaptive reuse of Stöng offers an interpretive response to one of Iceland’s most significant Viking-age sites. The project transforms an existing shelter into a renewed framework that safeguards eleventh-century remains while strengthening access, interpretation, and public engagement. Rather than replacing the deteriorated shelter, the design retains and reinforces its timber frame, conserving embodied carbon and keeping the site’s history legible. New elements of untreated larch, galvanized steel, and corrugated polycarbonate balance durability, lightness, and reversibility. The shelter is conceived between permanence and transience: robust enough for climate, yet adaptable enough to be disassembled. The intervention extends beyond enclosure. A bridge, platforms, and paths are integrated with the terrain, allowing movement without disturbing fragile ground conditions. Transparency and controlled circulation frame the encounter with ruins, enabling visitors to read them in relation to the valley. Environmental responsibility is embedded in construction and operation. Passive ventilation, daylight, permeable surfaces, and bioswales reduce infrastructure and maintenance. At Stöng, architecture becomes protector and interpreter, mediating ruin, landscape, climate, and public memory. The result is a holistic heritage intervention where preservation, material intelligence, and ecological sensitivity form a coherent vision.