Join 無料 upcoming events being held in Castilblanco. Castilblanco is a picturesque and historic town in the Extremadura region of western Spain, known for its well-preserved medieval architecture, including the 13th-century Castle of the Templars, and its beautiful natural surroundings, such as the Serra de São Mamede National Park, making it an ideal destination for travelers seeking to immerse themselves in Spanish history and culture.