The chief rivers on the west are the Nera (Nar), with its tributaries the Velino (Velinus) and Salto, and the Anio, both of which fall into the Tiber.
They offered a singular attraction to the Romans, and their presence in remote parts of the Mi nera country no doubt was often the principal cause of Roman S pr i ngs.
Above sealevel, in the valley of the Nera (anc. Nar), from which the town took its distinguishing epithet, 5 m.
Above the Nera valley, at the point where the river traverses a narrow ravine, and commands a fine view.
The central Apennines are crossed by the railway from Rome to Castelammare Adriatico via Avezzano and Sulmona: the railway from Orte to Terni (and thence to Foligno) follows the Nera valley; while from Terni a line ascends to the plain of Rieti, and thence crosses the central chain to Aquila, whence it follows the valley of the Aterno to Sulmona.
ORTIGUEIRA, a seaport of north-western Spain, in the province of Corunna; on the northern slope of the Sierra de la Faladoira, on the river Nera and on the eastern shore of the Rfa de Santa Marta - a winding, rock-bound and much indented inlet of the Bay of 'Biscay, between Capes Ortegal and Vares, the northernmost headlands of the Peninsula.