Stonehelm is a castle in the stormlands and is the ancient seat of House Swann. Its watchtowers are made of black and white stone.
The castle is situated in the Red Watch region of the eastern Dornish Marches, on Cape Wrath along the coast of the Sea of Dorne. It was built to oversee the Slayne, a major river route in the stormlands.
During the Vulture Hunt, Lord Orys Baratheon smashed the Dornish beneath the walls of Stonehelm, capturing Lord Walter Wyl.
Fletcher Dick was raised in a village near Stonehelm.