Arratia-Nerbioi is a comarca of the province of Biscay, in the Basque Country, Spain. It is formed by the valleys of the Arratia river and the Nervión river. It is one of the seven comarcas that compose the province of Biscay.
Wikipedia https://en.wikipedia.org/wiki/Arratia-Nerbioi
Coordinates 43°9'51.28" N -2°46'42.037" E
