DO area (Spanish: Rías Bajas) in the province of Pontevedra in the south-west of the north-western Spanish region of Galicia on the Atlantic coast on the border with Portugal. The name means "lower bays" and is the designation for four narrow sea bays reaching deep into the land, which were formed from flooded valleys of the rivers Ría de Muros y Noia, Ría de Arousa, Ría de Pontevedra and Ría de Vigo. There are five subzones, in all of them dominated by the white grape variety Albariño(Alvarinho), which occupies 95% of the vineyards:
- Condado do Tea (County of Tea): The mountainous area named after the river Tea (a tributary of the Miño) is the second largest, with about 550 hectares of vineyards on granite and slate soils. It is located near the border with Portugal near the town of Ponteareas.
- O Rosal: This area is located near the coast, south of the city of Vigo. The terraced vineyards cover over 300 hectares on granite and alluvial soils along the Miño river.
- Ribeira do Ulla: The area covers around 50 hectares of vineyards, mainly alluvial. It is located south of the famous pilgrimage site or destination of the Santiago de Compostela pilgrimage route. Here mainly red wines grow.
- Soutomaior: The smallest area, with 20 hectares of vineyards on sandy soils over granite bedrock, is located on the Verdugo river near Pontevedra. Only Albariño is cultivated here.
- Val do Salnés: The largest area, with 1,500 hectares of vineyards on granite, rock and alluvial soils, is considered the origin of the Albariño grape. It is located on the lower course of the Umia River, near the coast, north of Pontevedra. It is the coldest and wettest area.