Khyber Pass, Khyber also spelled Khaybar, or Khaibar, most northerly and critical of the passes between Afghanistan and Pakistan. The pass interfaces Kabul with Peshawar. The pass has truly been the door for intrusions of the Indian subcontinent from the northwest. The title Khyber is additionally connected to the extend of parched, broken slopes through which the pass runs and which frame the final goads of the Turn Ghar (Safīd Kuh) Extend. On either side of the interfacing edge are the sources of two little streams, the beds of which shape the Khyber gorge. This limit gorge shapes the Khyber Pass; it winds between cliffs of shale and limestone, 600–1,000 feet tall, and enters the Khyber Hills from the Shadi Bagiar opening, many miles past Jamrud, Pak., and proceeds northwestward for almost 33 miles (53 km). Fair past the ancient Afghan fortification of Haft Chah, it opens onto the fruitless Lowyah Dakkah plain, which extends to the Kabul River.