临冬城, also known as "Winterfell," is a prominent castle in the fictional world of A Song of Ice and Fire by George R.R. Martin. It serves as the ancestral home of House Stark, located in the North of the continent of Westeros. The castle is known for its large size, ancient architecture, and the presence of a weirwood tree in its godswood. The castle plays a crucial role in the series, serving as a central location for many key events. It is surrounded by a protective wall and features various structures, including a great hall and living quarters for the Stark family. The cold climate and rugged landscape reflect the harsh conditions of the North.