How about a fascinating day by the sea watching the feverish activity of the oldest seaside towns of the Costa da Morte, from the south?
You can see how the fish is unloaded at the port and witness the vertiginous bids at the fish market. This is a good opportunity to explore the rugged outline of this coastline that opens out into the ocean; to see one of Spain's largest tide mills and lagoons and sand dunes that are a haven for migratory bird species, as well as a river that spills right into the sea.