Buyan Island, from Slavic folklore. This island is the home of the Northern, Western, and Eastern Winds, and is where Koschei the Deathless hid his soul (in a needle in an egg in an oak tree). It can appear and disappear at will, and is the source of all weather. There is a stone on the island that marks the center of the universe, and if found, will grant you happiness for all time. The sacred oak (within which lies Koschei’s soul) was giant and worshiped as a deity, and sacrifices were made to it.