Hydraulic Flour Mill of Formentera del Segura Monument · Formentera del Segura, El Baix Segura, Alicante Image of Formentera del Segura, not of the place itself. An 18th-century monumental complex in the Sotos of the River Segura, made up of the weir and the flour mill, which remained in use until the 1960s and can be visited today. Photo: Galopax (CC BY-SA 4.0) What to see and do in Formentera del Segura