Location from House of the Dragon by George R.R. Martin
The largest and most cursed castle in Westeros, its towers melted by Balerion's dragonfire. Changes hands repeatedly during the Dance and serves as a Black stronghold in the Riverlands.
Harrenhal is a ruin that refuses to die. Built by Harren the Black as the greatest castle ever raised, it was destroyed on the day of its completion when Aegon the Conqueror rode Balerion over its walls and melted its towers into twisted stone. Every house that has held Harrenhal since has met a bad end — the curse is as famous as the castle itself. Its scale is absurd: five towers, each dwarfing any normal castle's keep, with halls large enough to ride horses through. During the Dance it serves as a key strategic position in the Riverlands, changing hands between Black and Green forces. Daemon Targaryen takes it for the Blacks, and it becomes a staging ground for their Riverlands campaign. The castle's association with dragonfire and doom makes it a fitting backdrop for a civil war fought with dragons.
The largest castle in Westeros and the most ruined. Towers melted by Balerion's dragonfire during the Conquest — stone flows like frozen candle wax. Five towers, each one crumbling. Cursed — every house that holds it falls.
Also known as: the cursed castle, Harren's seat, Black Harren's castle