The location of Eden is described in the Book of Genesis as the source of four tributaries. Various suggestions have been made for its location: at the head of the Persian Gulf, in southern Mesopotamia where the Tigris and Euphrates rivers run into the sea;and in Armenia. Others theorize that Eden was the entire Fertile Crescent or a region of "considerable size" in Mesopotamia, where its native inhabitants still exist in cities such as Telassar.
–Wikipedia