Ondarroa is a town and municipality located in the province of Biscay, in the autonomous community of Basque Country, northern Spain.Main sightsChurch of St. Mary, in late Gothic style (late 15th century)Likona Tower, a typical Basque tower-house.Itsas Aurre Bridge, designed by Santiago CalatravaTwin towns Santa Flavia, Italy Borj, Western Sahara