Esla (river) in the context of "Douro River"

The Douro (UK: /ˈdʊəroʊ, ˈdʊəruː/, US: /ˈdɔːruː, ˈdɔːroʊ/, Portuguese: [ˈdo(w)ɾu], Mirandese: [ˈdowɾʊ]; Spanish: Duero [ˈdweɾo]; Latin: Durius) is the largest river of the Iberian Peninsula by discharge. It rises near Duruelo de la Sierra in the Spanish province of Soria, meanders briefly south, then flows generally west through the northern part of the Meseta Central in Castile and León into northern Portugal. Its largest tributary (carrying more water than the Douro at their confluence) is the right-bank Esla. The Douro flows into the Atlantic Ocean at Porto, the second largest city of Portugal.

The scenic Douro railway line runs close to the river. Adjacent areas produce port (a mildly fortified wine) and other agricultural produce. A small tributary of the river has the Côa Valley Paleolithic Art site which is considered important to the archaeological pre-historic patrimony, designated a UNESCO World Heritage Site. Within Spain, it flows through the middle of the autonomous community of Castile and León, with the basin spanning through the northern half of the Meseta Central. The latter includes wine producing areas such as the Ribera del Duero DOP.

The Astures or Asturs, also named Astyrs, were the Hispano-Celtic inhabitants of the northwest area of Hispania that now comprises almost the entire modern autonomous community of the Principality of Asturias, the modern province of León, and the northern part of the modern province of Zamora (all in Spain), and eastern Trás os Montes in Portugal. They were a horse-riding highland cattle-raising people who lived in circular huts of stone drywall construction. The Albiones were a major tribe from western Asturias. Isidore of Seville gave an etymology as coming from a river Astura, identified by David Magie as the Órbigo River in the plain of León, and by others as the modern Esla River.