Reservoir of el Cenajo Nature · Hellín, Campos de Hellín, Albacete The largest of the reservoirs on the river Segura, located at the so-called Estrecho de la Herradura, on the boundary between Castilla-La Mancha and the Region of Murcia; the dam stands in the municipality of Moratalla and the reservoir basin is shared between the Albacete municipalities of Hellín, Socovos and Férez. It was built between 1943 and 1952 as part of Francoism's policy of hydraulic works to control flooding on the Segura, with a workforce of up to 350 labourers, many of them political and common prisoners from the jails of Hellín and Las Minas who were working off their sentences. The project, awarded to the same company that built the Valle de los Caídos, cost the lives of several workers, including three who in 1954 fell from a height of 76 metres, in whose memory a cross was erected. Photo: Superchilum (CC BY-SA 4.0) What to see and do in Hellín