The world’s unclimbed mountains are the last great challenges in mountaineering. We look at the most coveted of these unconquered summits
In January 2021, Nirmal Purja and his team of Nepali climbers completed the first winter ascent of K2, the world’s second-highest mountain. K2 was the final 8,000m peak awaiting a winter ascent after Nanga Parbat, Pakistan’s ‘Killer Mountain’, was scaled in 2016.