One of the smaller older citadel's. Today it belongs to the House of Deton but it used to act as a watch tower for the combined forces of the north under the banner of the House of Sleth.
The citadel was originally two towers but centuries ago one of the towers collapsed after an earthquake - it now struts out at an odd angle and has abandoned by people and reclaimed by the creatures of the wild snowy wastes desperate for shelter. Inside the tower is crumbling, its become its own bizarre ecosystem. It is known as The Broken Tower.
The citadel is home to a macabre artifact - the golden teeth of a former lord of House of Sleth who was executed by the king by being dissolved in a vat of acid, only his teeth were sent back for his family to bury. But they did not bury them, they created a chamber to proudly display them, erecting a golden head of their fallen leader to display them in and more threateningly they created a room of acid baths were they promised to dissolve the bodies of every soldier of the king that died in the north. There would be no trace of them.
The Room of Golden Teeth and the Chamber of Acid are still there and in the later case still used in extreme circumstances.