Dun Fort

The Dun Fort is a castle in the port-town of Duskendale. It serves as the seat of House Rykker, formerly House Darklyn, and the administrative center of Duskendale. It has four towers on each corner of the structure, and is surrounded by a wall. It overlooks Blackwater Bay.

History
After the Defiance of Duskendale and subsequent extinction of House Darklyn, House Rykker were given the Dun Fort.

In the books
In the A Song of Ice and Fire novels, Brienne of Tarth visits the Dun Fort during her search for Sansa Stark. She does not find Lord Renfred Rykker but the castellan, Ser Rufus Leek, as Lord Rykker is with Randyll Tarly at Maidenpool. The castle has a bald maester with a freckled scalp and a red mustache.