Dreadfort

The Dreadfort is a castle situated in the North. It is the seat of House Bolton, located on the banks of the Weeping Water east of Winterfell. The Dreadfort is ill-omened as the stronghold of House Bolton, who are famed for the flayed skins of their enemies, often rumored to have been kept on display in the castle, including those of several ancient Stark kings. However, if such gruesome trophies ever did exist they have long since been removed or destroyed.

Background
House Bolton of the Dreadfort had a long history of dissent and rebellion, to the point were they became known as the "Bane of the North".