Valley of the Nágima river Nature · Pozuel de Ariza, Comunidad de Calatayud, Zaragoza Image of Pozuel de Ariza, not of the place itself. The río Nágima rises in Bliecos, in the province of Soria, and runs about 25.5 kilometres before flowing into the Jalón on its left bank at Monreal de Ariza. Before reaching that final stretch it passes through Serón de Nágima, Torlengua, Fuentelmonge and Monteagudo de las Vicarías -where its waters feed a reservoir- and through Pozuel de Ariza, running just a few steps from its town centre. The floodplain it forms along its course shapes the municipal area of Pozuel de Ariza, a flat terrain where rain-fed cereal farming alternates with small irrigated market gardens beside the river. Photo: Diego Delso (CC BY-SA 4.0) What to see and do in Pozuel de Ariza