In 1970, Chris Bonington and his now-legendary team of mountaineers were the first climbers to tackle a big wall at extreme altitude. Their target was the south face of Nepal's Annapurna: 12,000 feet of steep rock and ice leading to a 26, 454-ft. summit. As serious armchair climbers will tell you, Annapurna South Face is better than all but a handful of equally gripping classics. One could also argue that all that has happened in the big mountains...