It is said that there are spells woven into the stonework of Storm's End. The maester's cell and the rookery are located at the top of the tower, which is windowless on the side facing the sea.

The main hall of the castle is called the Round Hall. The tower is so large that it comfortably contains the granary, barracks, armory, feast hall, and lord's chambers all at once. Storm's End has only one tower, a colossal drum tower crowned with formidable battlements, making it look like a huge, spiked fist thrusting towards the sky from afar. The curtain wall protects the castle's kitchens, stables, and yard. There is no safe anchorage by the castle. On the seaward side, there is a one hundred fifty foot drop below the wall into the sea. The wall is smooth and curving, the stones so well placed and so perfectly fit together that the wind can find no purchase. It is composed of a double course of pale grey stone with an inner core of sand and rubble. Storm's End is surrounded by a massive outer curtain wall, one hundred feet high and forty feet thick on its thinnest side and nearly eighty feet thick on its seaward side.

Game of thrones storms end