Khojak railroad tunnel 3.9 kilometres (2.4 mi) long; pictured on the old five rupees note.
Small forts defend the pass on each hill top.
"Historically, the Achakzai, across the Khojak Mountains, have controlled the smuggling routes around the Khojak Pass, one of the two major mountain passes that connect the Middle East with the Indian subcontinent, the other being the more famous" Khyber Pass.[3]