The great highway from the west existed before Cyrus conquered Cilicia. On its long rough descent from the Anatolian plateau to Tarsus, it ran through the narrow pass between walls of rock called the Cilician Gates. After crossing the low hills east of the Pyramus it passed through a masonry (Cilician) gate, Demir Kapu, and entered the plain of Issus. From that plain one road ran southward through another masonry (Syrian) gate to Alexandretta, and thence crossed Mt. Amanus by the Syrian Gate, Beilan Pass, eventually to Antioch and Syria. Another road ran northwards through a masonry (Armenian) gate, south of Toprak Kale, and crossed Mt. Amanus by the Armenian Gate, Baghche Pass, to northern Syria and the Euphrates. By the last pass, which was apparently unknown to Alexander, Darius crossed the mountains prior to the battle of Issus. Both passes are short and easy and connect Cilicia Pedias geographically and politically with Syria rather than with Anatolia.