As the Spanish Civil War drew to a close, retreating Republican troops in the northern region of Asturias took refuge in caves in the mountains from the brutal victor's justice of the Francoist forces. In this paper we examine three of these caves in the context of the Civil War experiences of the rural municipality of Santo Adriano, based on a combination of archaeological recording and oral history interviews. The paper focuses on the role of the La Ponte-Ecomuseum, a grassroots heritage organisation that has worked to preserve and communicate the tangible and intangible heritage of the district. The Civil War heritage presents cultural, political and practical challenges for the museum: nonetheless it has succeeded in establishing an ongoing programme for its communication and protection.