Nanga Parbat, Pakistan. Nanga Parbat is often referred to as the highest mountain face in the world: the Rupal Face rises 4,600 m [15,000 ft] above its base. To the north, the complex, somewhat more gently sloped Rakhiot Flank rises 7,000 m [23,000 ft] from the Indus River valley to the summit in just 27 km [16.8 miles], one of the 10 greatest elevation gains in so short a distance on Earth. Nanga Parbat has never been climbed in winter!