cataract on the South Nahanni River, a tributary of the Liard, in Nahanni National Park (1,840 square miles 【4,766 square km】), Northwest Territories, Canada, 76 miles (120 km) east of the Yukon border. Highest in the region, the spectacular falls have a drop of 316 feet (96 m) and are shrouded in mist. They are divided near the centre by a pillar of limestone, with sheer cliffs rising to heights of 2,000 feet (610 m) at some points on either side of the canyon.