Festival of o Mexillón de Rianxo Activity · Rianxo, Barbanza, A Coruña Image of Rianxo, not of the place itself. A summer event of the port of Rianxo at which raft-grown mussel is served steamed, in vinaigrette, marinated, in empanada, in croquettes and in a surf-and-turf stew with beans and pork belly. Photo: Luis Miguel Bugallo Sánchez (Lmbuga Commons)(Lmbuga Galipedia) (CC BY-SA 3.0) What to see and do in Rianxo