[2] It is surrounded by the Basque municipalities of Carranza, Arcentales, and Trucíos, but the town belongs to the administration of the government of Cantabria.

[citation needed] The valley was purchased in the mid-15th century by Pedro Fernández de Velasco, at which point it ceased to be part of Biscay, the antecedent to its current status as an enclave.

[4] One notable older building is the Church of Santa María, its interior in ruins due to the 1875 fighting and later abandonment.

Also similarly, this intent is opposed by the Cantabrian government: Miguel Ángel Revilla, president of the autonomous community of Cantabria was clear in his unwillingness to cede the municipality.

In 1979, deputies (congressmen) Xabier Arzalluz of the Basque Nationalist Party (PNV) and Juan María Bandrés of Euskadiko Ezkerra, affirmed that Article 8 of the then-new Statute of Autonomy of the Basque Country was intended to integrate the enclave of Treviño into Álava and the enclave of Villaverde into Biscay.