Harrenhal

Harrenhal is a ruined castle, the largest one in all of Westeros, though it is also the most ill-omened. It is located on the northern shore of the Gods Eye lake at the heart of the Riverlands, south of the River Trident and northwest of King's Landing.

The castle has become the seat of many houses since the extinction of House Hoare, most notably Houses Lothston and Whent.