The Pass became widely known to thousands of Westerners and Japanese who traveled it in the days of the Hippie trail, taking a bus or car from Kabul to the Afghan border. At the Pakistani frontier post, travelers were advised not to wander away from the road, as the location was a barely controlled Federally Administered Tribal Area. Then, after customs formalities, a quick daylight drive through the Pass was made. Monuments left by British Army units, as well as hillside forts, could be viewed from the highway. The area of the Khyber Pass has been connected with a counterfeit(偽造の)arms industry, making various types of weapons known to gun collectors as Khyber Pass Copies, using local steel and blacksmiths' forges(鍛冶場). (https://en.wikipedia.org/wiki/Khyber_Pass)