From A Wiki of Ice and Fire
Driftmark is an island near Dragonstone. It is the seat of House Velaryon. It has a long point. During the reign of King Viserys I Targaryen there were at least three settlements in Driftmark: High Tide, Hull, and Spicetown.
During the Dance of the Dragons, Lord Corlys Velaryon, the Sea Snake, launched black ships from Hull and Spicetown to block access to Blackwater Bay. High Tide and Spicetown were burnt in the Battle in the Gullet, the latter so severely it was not rebuilt.