Rising in western Tibet, the Indus runs at first across a high plateau, then the ground falls away and the river, dropping rapidly, gathering momentum and rushing north-west, collects the waters from innumerable glacier-fed streams, and runs north-west between the world's greatest mountain ranges, the Karakoram and the Himalayas. In Kashmir it crosses the United Nations cease-fire line and, in Baltistan District, enters Azad Kashmir. From here on it is Pakistan's river; Pakistan's first town on the upper Indus, Skardu, at 7,500 feet above sea-level, stands on a bluff near the junction of the Indus and one of its great right-bank tributaries, the Shigar. The majority of the people live in Skardu town; others inhabit small and scattered villages along the Indus and Shigar valleys, or tiny hamlets high on the surrounding mountains.