Beginning in Valvidares,
Sariego, the Nora continues through the concejos of
Siero and
Noreña. In its final kilometers, it serves as a natural border between
Oviedo and
Llanera first, and between Oviedo and
Las Regueras later. It is located between Priañes (Oviedo),
Santa María de Grado (
Grado) and Tahoces (Las Regueras). Near its outlet, the landscape is beautiful. The dam of the Priañes reservoir and a hydroelectric power station of the same name are owned by HC Energía. Sofoxo is a cave on the river's right bank; it was discovered by Count de la Vega del Sella. The Roman bridge, Puente del Romanon, spans the river at
Pola de Siero, east of Oviedo. ==References==