Mount Hyjal

Mount Hyjal is a mountainous region in the northern reaches of Kalimdor that is home to the original world tree of the night elves, Nordrassil, and the second Well of Eternity, which is beneath it, that once granted the night elven race immortality. The region was host to the Battle of Mount Hyjal during the Third War, a vicious conflict against the Burning Legion resulting in the destruction of the Well of Eternity, but defeat of their invasion.