On old maps, O Grove was an island. Today, it is joined to the mainland thanks to the south-westerly winds, which have slowly gathered sand to form the isthmus of the beach of A Lanzada.

O Grove is situated on the mouth of the Arousa estuary. The sight of its many-coloured boats forms an unforgettable image. As well as shellfish gathering and shallow-water fishing, the population lives from the farming of mussels, oysters and scallops on wooden platforms out in the water. A reason why it is impossible to leave without trying them in any of the local bars. The port of O Grove is devoted to fishing and mussel gathering and sits very near Illa de A Toxa, whose fame is derived from its medicinal mineral waters. The therapeutic properties for the skin and the respiratory passages of its water and mud, as well as the salts and soaps which are made from them, have turned the island into a major spa resort. A Toxa is the biggest of the islands, half a dozen of them, which emerge with the rhythm of the tides on the O Vao mud flats.

O Grove stages the festival which extols the virtues of shellfish, declared to be of National Tourist Interest. It takes place over several days, always around 12 October. Designation of Origin “Rías Baixas” wines accompany the wide variety of seafood.