Museum of el Ferrocarril de Cistierna Monument · Cistierna, La Montaña de Riaño, León Image of Cistierna, not of the place itself. Opened in July 2009 in the old warehouse of the narrow-gauge line, it gathers the memory of the coal railway that sustained the valley's economy from the nineteenth century until the mining decline of 1991. Photo: Zarateman (CC0) What to see and do in Cistierna