The former Moorish castle (fortress) in the old city of Segovia is still used as a royal palace. The castle was also a star in the season of Game of Thrones! The Alcazar of Segovia, Spain Check it out:
Hohenzollern Castle (German: Burg Hohenzollern) is a castle about 50 kilometers mi) south of Stuttgart, Germany. It is considered the ancestral seat of the Hohenzollern family, which emerged in the Middle Ages and eventually became German Emperors.
Kiss that Blarney Stone! I am Irish after all! Blarney Castle with its moat, in Ireland. Home of the "Blarney Stone" where you bend over backwards to kiss the Blarney Stone to be bestowed with the gift of Eloquence.