Banks of the Eo in San Tirso de Abres Nature · San Tirso de Abres, Eo-Navia, Asturias Image of San Tirso de Abres, not of the place itself. The only Asturian municipality that the Eo crosses from end to end over Silurian slates, with riverside woods and pools where trout and salmon are fished; with fewer than four hundred residents, it won the Premio al Pueblo Ejemplar de Asturias in 2011. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in San Tirso de Abres