Coal from the Oviedo mines is exported coastwise, and in 1904 the shipments from Aviles for the first time exceeded those from Gijon, reaching a total of more than 290,000 tons.
The estuaries of these rivers are rarely navigable, and along the entire littoral, a distance of 130 m., the only important harbours are at Gijon and Aviles.
Gijon, a seaport of northern Spain, in the province of Oviedo; on the Bay of Biscay, and at the terminus of railways from Aviles, Oviedo and Langreo.
The older parts of Gijon, which are partly enclosed by ancient walls, occupy the upper slopes of a peninsular headland, Santa Catalina Point; while its more modern suburbs extend along the shore to Cape Torres, on the west, and Cape San Lorenzo, on the east.
Few of the buildings of Gijon are noteworthy for any architectural merit, except perhaps the 15th-century parish church of San Pedro, which has a triple row of aisles on each side, the palace of the marquesses of Revillajigedo (or Revilla Gigedo), and the Asturian Institute or Jovellanos Institute.