The Secret Hill was a hill associated with the Deep Magic of the Emperor-beyond-the-Sea. On the Secret Hill are fire-stones, on which the Deep Magic is carved in letters as deep as a spear is long. The location of the hill is unknown, but likely possibilities include somewhere in Aslan's Country and the Western Wilds, which also hide the Hill of the Garden of Youth. Despite its secrecy, both Jadis and Aslan understood the hill's existence and meaning, though no other Narnian ever mentions the place.