Hoare Castle is located on the island of Great Wyk.
House Hoare was originally from the island of Orkmont. It is unknown when they had a new castle built on Great Wyk.
King Harmund III Hoare was overthrown by the Drowned Men, and was subsequently imprisoned in Hoare Castle, crowned his brother, and mutilated his mother, Queen Lelia Lannister. In retaliation, House Lannister invaded the Iron Islands. Ser Aubrey Crakehall, the Lannister commander, took the castle, gave the gift of mercy to Harmund, and ordered the castle to be razed to the ground.