Arnoia River hot springs Nature · Baños de Molgas, Allariz - Maceda, Ourense Image of Baños de Molgas, not of the place itself. Springs listed as a site of geological interest which surface in the bed of the Arnoia itself as it passes through the town; the main spring rises at 49 degrees and its waters are bicarbonated, sodium-rich, silicated and oligomineral. Photo: Elisardojm (CC BY-SA 4.0) What to see and do in Baños de Molgas