The coastline has, in turn, two parts. The first, comfortable, calm, low, relaxed, it is the interior of the ría de Vigo from the historic bridge of Soutomaior until it passes the bay of Baiona with the Illas Estelas (Nature 2000 Network). The second, when it suddenly turns southward, abrupt, very battered by the Atlantic, with tiny ports except that of A Guarda, at the foot of Monte Santa Tegra and its Castro culture village.
At its end, the river is the River Miño, a Site of Community Importance, which links Galicia with Portugal and dies out in a wide, spectacular estuary, after passing through historic, fortified towns such as Salvaterra de Miño and Tui, and a strip of vineyards within the Rías Baixas Designation of Origin. Also included in the Nature 2000 Network are the waters of the Tea River and the estuary of the Miñor River in A Ramallosa. And the mountains mark the territory of both of them. Low-lying and old, some – such as that of Aloia – have been declared Nature Parks. The A Groba mountain range is one of the wildest in the province.