Reservoir of Albarellos Nature · Leiro, Ribeiro, Ourense Image of Leiro, not of the place itself. A reservoir completed in 1971 on the River Avia, with an arch dam 90 metres high and 285 metres along the crest holding back 90.7 cubic hectometres; its water surface is shared between the districts of Leiro, Avión and Boborás. Photo: José Antonio Gil Martínez from Vigo, Galicia (CC BY 2.0) What to see and do in Leiro