Potholes of the río Castro Nature · Muxía, Fisterra, A Coruña The río Castro carves in the rock a succession of pools and small falls that the residents call caldeiras; they lie inland, far from the capes and sanctuaries that give the concello its fame, on a stretch of riverside woodland. Photo: LUIS MATIAS LOPEZ RI… (CC BY-SA 3.0) What to see and do in Muxía