Castile-Leon (Spanish: Castilla y León) is an autonomous region of Spain. It is composed of two regions, León (provinces of León, Zamora and Salamanca) and Castile (provincies of Avila, Burgos, Palencia, Segovia, Soria and Valladolid).
Of the former Kingdom of Castile
Of the former Kingdom of Leon
Castilla y León is an autonomous community of Spain, the country's largest — in fact, it is the largest subnational political division in the European Union. It is formed by the union of two ancient kingdoms: Old Castile and the Kingdom of León, which were separated and reunited several times in the Middle Ages.
Spanish is the main language, everybody in Castile-Leon speak Spanish, but in the provinces of León, Zamora and some parts of Salamanca the Leonese langauge, "llïonés", is also spoken by a little minority, along with Galician. In Treviño (Burgos province) Basque is still preserved. If I were you, I would definitly come here.