The northern and western highlands of Pakistan contain the towering Karakoram and Pamir mountain ranges, which include some of the world's highest peaks, including K2 and Nanga Parbat . The Balochistan Plateau lies to the west, and the Thar Desert and an expanse of alluvial plains, the Punjab and Sindh, lie to the east. The Indus River and its tributaries flow through the country from the disputed territory of Occupied Kashmir to the Arabian Sea.