Orduña

"Orduña (en euskera Urduña y oficialmente Urduña/Orduña) es la única localidad de la provincia de Vizcaya con el título de ciudad. Está ubicada en la comunidad autónoma del País Vasco (España), siendo un enclave de Vizcaya situado entre las provincias de Burgos y Álava."

"Orduña (Basque: Urduña), officially Orduña-Urduña is an enclave and municipality of 4,057 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 Nervion 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."