Most of the story takes place on the continent of Westeros and in a large political entity known as the Seven Kingdoms. Those kingdoms are spread across nine regions: the North, the Iron Islands, the Riverlands, the Vale, the Westerlands, the Stormlands, the Reach, the Crownlands, and Dorne. A massive wall of ice and old magic separates the Seven Kingdoms from the largely unmapped area to the north. The vast continent of Essos is located east of Westeros, across the Narrow Sea. The closest foreign nations to Westeros are the Free Cities, a collection of nine independent city-states along the western edge of Essos. The lands along the southern coastline of Essos are called the Lands of the Summer Sea and include Slaver's Bay and the ruins of Valyria. The latter is the former home of the ancestors of House Targaryen. To the south of Essos are the continents of Sothoryos and Ulthos, which in the narrative are largely unexplored.