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.
