Seat of House Uller, standing on the banks of the Brimstone where that sulfurous river winds through the deep desert of Dorne. The Ullers are accounted half-mad even by other Dornishmen, and their grim hold has earned its name many times over.
The Fall of a Dragon
When the dragons came to conquer Dorne, it was above Hellholt that one fell. A scorpion bolt loosed from the castle walls took the great she-dragon through the eye, and beast and rider alike plunged from the sky. No conqueror has forgotten it, nor has any Uller let them.
The Brimstone
The river that waters the castle runs pale and stinking with sulfur, unfit to drink, yet it is the only lifeline through the burning sands. Caravans that follow its course pay their respects at Hellholt, for the Ullers' goodwill is safer kept than lost.