The northern border of the corridor is formed by the Pamir River and Lake Zorkul in the west and the high peaks of the Pamir Mountains in the east. To the north is Tajikistan's Gorno-Badakhshan Autonomous region. To the south, the corridor is bounded by the high mountains of the Hindu Kush and Karakoram. Along the southern flank of the corridor, there are two mountain passes which connect the corridor to its neighbours. The Broghol pass offers access to the Khyber Pakhtunkhwa region of Pakistan, while the Irshad Pass connects the corridor to Gilgit Baltistan. The Dilisang Pass, which also connects to Gilgit-Baltistan, is disused. The easternmost pass, as indicated above, is the Wakhjir Pass, which connects to China and is the only border connection between that country and Afghanistan.