The Karakoram Highway connects Islamabad to Gilgit and Skardu, which are the two major hubs for mountaineering expeditions in Gilgit-Baltistan. Northern Areas Transport Corporation (NATCO) offers bus and jeep transport service to the two hubs and several other popular destinations, lakes, and glaciers in the area. Landslides on the Karakoram Highway are very common. The Karakoram Highway connects Gilgit to Tashkurgan Town, Kashgar, China via Sust, the customs and health-inspection post on the Gilgit-Baltistan side, and the Khunjerab Pass, the highest paved international border crossing in the world at .