The Eyrie is the principal stronghold of House Arryn. It is located in the Vale of Arryn near the east coast of Westeros. The Eyrie straddles the top of a peak in the Mountains of the Moon several thousand feet above the valley floor below. It is approached by a narrow causeway and road. Those who would approach the Eyrie must pass through three way-castles guarding the ascent. For these reasons, the Eyrie is considered impregnable to attack.
