The watermill of la Fuente and its fish weir Monument · San Morales, Las Villas, Salamanca Image of San Morales, not of the place itself. In the annexed settlement of Aceña de la Fuente the weir is preserved that diverted the water of the Tormes towards the mill to use its force in grinding grain, one of the few hydraulic works of the river's middle stretch still standing. Photo: Malopez 21 (CC BY-SA 4.0) What to see and do in San Morales