Orduña-Urduña
Urduña/Orduña is an enclave and municipality of 4,232 inhabitants located in the province of Biscay, in the autonomous community of Basque Country, in the North of Spain.
It is located in a plain in the highest part of the Nervión river valley, at the foot of the Sierra Salbada mountains. The municipality is an exclave of Biscay, located between Álava and Burgos provinces.
Orduña is the final station of the commuter rail line C-3 that links the town with Bilbao.
