"Khyber Pass." YourDictionary, n.d. Web. 16 January 2019. <https://www.yourdictionary.com/khyber-pass>.
Khyber Pass. (n.d.). Retrieved January 16th, 2019, from https://www.yourdictionary.com/khyber-pass
A narrow mountain pass on the border between eastern Afghanistan and northern Pakistan. It has long been a strategic trade and invasion route. The highest point of the pass is about 1,070 m (3,510 ft).