Rivers flowing down from the Cantabrian Mountains in Spain’s Province of León are flanked by bright green agricultural areas. The two principal rivers visible are the Óbrigo (left) and the Esla (right), which converge below Benavente.
The Esla River is a tributary of the Duero River which starts in the Cantabrian Mountains and is 286 km in length, crossing from north to south the provinces of León and Zamora. It is the largest tribuary of the Duero in terms of discharge; in fact, at its mouth, it has a greater discharge than the Duero itself does at that point.
The Órbigo River, also flowing through the provinces of León and Zamora, begins at the convergence of the Luna River and the Omaña River in the town of Santiago del Molinillo. Green fields extend far eastward from its banks, almost converging with those along the banks of the Esla.