The path to Sky is treacherous. It is open to the wind and the steps are cracked and broken from the constant freezing. Sky is a high, crescent-shaped wall of unmortared stone raised against the side of the Giant's Lance. Inside the walls are a series of ramps and a great tumble of boulders and stones of all sizes, ready to throw down or even cause a minor avalanche. There is a cavern containing a long natural hall, barracks, stables for mules, and supplies. Handholds carved into the rock lead to the Eyrie, while earthen ramps give access to the walls. The Eyrie, located six hundred feet above, can be reached by Sky's handholds in the rocky chimney which lead to the castle's undercellar, or by taking wicker baskets and oaken supply buckets pulled by chain winches.
A Game of Thrones
A Feast for Crows