Treviño enclave
The Treviño Enclave (Basque: Trebiñuko Barrendegia Spanish: Enclave de Treviño) in northern Spain is part of the territory of the province of Burgos (part of Castile and León), but is completely surrounded by the territory of the Basque Country province of Álava. Thus, it is an enclave of the Basque Country and an exclave of Castile and León.