Night's Watch.

About Night's Watch

George R. R. Martin's A Song of Ice and Fire saga features a large cast of characters. The series follows three interwoven plotlines: a dynastic war for control of Westeros by several families; the rising threat of the Others beyond the northern border of Westeros; and the ambition of Daenerys Targaryen, the exiled heir of the previous ruling dynasty. In Martin's fictional world, the Great Houses of Westeros represent the Seven Kingdoms which exist on the continent: the North, the Iron Islands, the Vale of Arryn, the Westerlands, the Stormlands, the Reach, and Dorne. A massive wall of ice and old magic separates the Seven Kingdoms from the largely unmapped area in the most northern portion of the continent.