Which is the legendary pass links pakistan with Afghanistan?

Khyber pass is the legendary pass that links Pakistan with Afghanistan.  The Pass was an integral part of the ancient Silk Road and throughout history, it has been an critical trade route among Central Asia and South Asia and a strategic military location. The summit of the Khyber Pass is 5 kilometres (3.1 mi) inside Pakistan at Landi Kotal and it cuts through the northeastern part of the Safed Koh mountains which themselves are a far southeastern extension of the Hindu Kush range.