Castle Greystone is home to the royal family of Nanteos. It is located just inside the city limits of Nanteos. It is said to contain a bowling alley, nuclear shelter, movie theatre, indoor swimming pool, and a dining room big enough to seat 2000. King William II built Castle Greystone to get his familiy away from the stress of government life at Castle Nanteos. It is said to have been built in 2 weeks.