Serra Seca Nature · Viana do Bolo, Viana, Ourense Image of Viana do Bolo, not of the place itself. A mountain chain that tops 1,200 metres of altitude and closes the municipality off to the east, separating the Bibei valley from the uplands of A Gudiña; its name refers to the scarcity of surface water on its ridges. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Viana do Bolo