Stepping inside reveals the most exclusive element of this architectural sauna: a luminous, pristine Aspen interior that feels soft to the touch and remains historically bright. This creates a breathtaking “geode” effect as the dark, charred exterior opens into a radiant inner sanctuary. Designed with a vertical “soft cube” silhouette, it maximizes headroom and volume, while the expansive black-tinted glass front dissolves the boundary between you and the outdoors. Fully insulated for year-round US climates, the Stromboli Large offers a spacious, high-contrast retreat where modern design meets elemental power.

Part of the exclusive Heritage Architectural Series, the Heritage Lux Stromboli Large is a commanding architectural masterpiece, expanded to accommodate families and social gatherings without compromising its fortress-like mystique. Named after the volcanic Mediterranean isle, this 6–8 person sanctuary features a dramatic "Shou Sugi Ban" exterior—an ancient Japanese technique of charring wood to create a deep, obsidian finish that is naturally weather-resistant and visually arresting.