There are many reasons why a castle gets built. Some are strong rooms to protect a town’s goodies. Others are built to garrison troops. Some are built just to show off!
The castle at Zonza was all about demonstrating the power of the King. It’s black granite towers rose up above the trees, and from the top the King could survey all the lands under his domain, all the way to the sea!

It was built with the help of an ancient sorcerer, a Corsican Mazerre, who tapped into dragon-magic to raise the sheer black walls of the castle high above the valley floor.
Of course, there is nothing much left to see these days of the Castle of Zonza, but beware, for the dragon magic persists, and remains very potent to this day…