This paper explores Spatial Augmented Reality (SAR) implementation for cultural heritage interpretation, focusing on built heritage and interactive storytelling. Using Finland’s Finlayson Factory as a case study, we investigate how SAR bridges digital narratives with physical historical contexts. We propose a workflow for transforming virtual narratives into spatial experiences through Research through Design that covers narrative analysis, spatial selection, conceptual translation, and evaluation. Our approach emphasizes accessibility, intuitive interactions, collaborative engagement, and immersive storytelling. Practical considerations including budget planning and operational integration are addressed to assess feasibility. This concept contributes insights for museums adopting interactive technologies to enhance visitor engagement with historical content.