The world’s most extreme road trips

Karakoram Highway, Pakistan and ChinaWhether you are desperately revving your car’s engine to clear a narrow pass or grinding through an endless expanse of sand in a 4X4, these five roads have gained a reputation for being among the most brutal in the world. A centuries-old trading trail that once formed part of the famed Silk Road, the Karakoram Highway is the world’s highest altitude paved international road.