Based on the German castle of Neuschwanstein, the Eyrie is the seat of House Arryn. It is situated on the Giant's Lance and reachable only by a narrow mule trail, guarded by the Gates of the Moon and three small castles, titled Stone, Snow, and Sky. Travelers must enter the Gates of the Moon and its upper bailey before reaching the narrow path up the mountain. The steps up the Giant's Lance starts directly behind the Gates of the Moon. The Eyrie clings to the mountain and is six hundred feet above Sky. The last part of the climb to the Eyrie is something of a cross between a chimney and a stone ladder, which leads to the Eyrie's cellar entrance. Due to the Mountains of the Moon's harsh winters, travel to and from the Eyrie is possible through the mountains only in summer.