Great Wyk is the largest of The Iron Islands and is the westernmost, excluding Lonely Light . Because of its size, some of its castles, such as Hammerhorn, are landlocked. The majority of the iron and tin mines on the Iron Islands are located on Great Wyk, much from the Hardstone Hills, a central range running through the island.
The island was the first to build a sept during the reign of King Wulfgar Hoare. It was conquered by Aegon Targaryen during the Conquest and later by Stannis Baratheon during the Greyjoy Rebellion.
The major houses of Great Wyk include House Merlyn of Pebbleton, House Sparr, House Goodbrother of Hammerhorn, and House Farwynd of Sealskin Point. House Goodbrother has many branches located on Great Wyk, including those at Corpse Lake , Crow Spike Keep, and Downdelving . Pebbleton is the main trading town on the island.