The highway meets the Indus River at Thakot and continues along the river until Jaglot, where the Gilgit River joins the Indus River. This is where three great mountain ranges meet: the Hindukush, the Himalayas, and the Karakoram. The western end of the Himalayas, marked by the ninth highest peak in the world, Nanga Parbat, can be seen from the highway. The highway passes through the capital of Gilgit–Baltistan, Gilgit, and continues through the valleys of Nagar and Hunza, along the Hunza River. Some of the highest mountains and famous glaciers in Karakoram can be seen in this section. The highway meets the Pakistani-Chinese border at Khunjerab Pass. Karakoram Highway reconstruction As part of the $46 billion China Pakistan Economic Corridor, reconstruction and upgrade works on the Pakistani portion of the Karakoram Highway (KKH) are underway. The KKH spans the long distance between the China-Pakistan border and the town of Hasan Abdal. At Burhan Interchange near Hasan Abdal, the existing M1 motorway will intersect the Karakoram Highway. From there, access onwards to Islamabad and Lahore continues as part of the existing M1 and M2 motorways, while Hasan Abdal will also be at intersection of the Eastern Alignment, and the Western Alignment which will lead towards the port city of Gwadar. Karakoram Highway Realignment (China-Pakistan Friendship Tunnels) A large section of the highway was damaged by a landslide in 2010 that created Attabad Lake. The resulting landslides cut off both the Hunza River and Karakoram Highway resulting in the formation of the reservoir. Prior to the completion of the bypass, all vehicular traffic had to be loaded onto boats to traverse the new reservoir. Construction of the tunnels began in 2012 and required 36 months for completion. The long series of bridges and tunnels was inaugurated on 15 September 2015 at a cost of $275 million and was hailed as a major accomplishment. The route comprises five tunnels and several bridges. The longest tunnel is , followed by , , and , while the Shishkat Great Bridge on Hunza River is long. The realignment restored the road link between Pakistan and China. Chinese section The Chinese section of the Karakoram Highway follows the north-south Sarykol ("Yellow Lake") valley just west of the Tarim Basin. The road from Kashgar goes southwest about and then turns west to enter the Gez (Ghez) River canyon between Chakragil mountain on the north and Kongur Tagh