北境, or the "North Realm," refers to the northern regions in various contexts, often associated with colder climates and rugged landscapes. In literature and popular culture, it can represent a place of mystery and adventure, often inhabited by unique creatures and cultures. In the context of Game of Thrones, 北境 is known as the territory of the Stark family, characterized by its harsh winters and strong sense of honor. The North is home to the Wall, a massive ice structure that protects the realm from threats beyond, including the mythical White Walkers.