Ortuella is a town and municipality located in the province of Biscay, in the Autonomous Community of Basque Country, northern Spain.

Santurtzi is a port town in the province of Biscay, in the autonomous community of Basque Country, Spain. It is located in the Bilbao Abra bay, near the mouth of the Nervión river, on its left bank, 14 km downriver from Bilbao and forms part of the Greater Bilbao agglomeration. It has a population of 45,853 (2019) and a land area of 6.77 km2.