While Mt.Everest might have just gotten taller by another few metres, it is by no means the most dangerous mountain to climb on this planet. There are multiple other peaks, scattered over the continents that give even the most skilled and experienced mountaineers chills when thinking about scaling them. Some of the most dangerous mountains in the world are Annapurna, K2, Kanchenjunga, Nanga Parbat, The Eiger and the Matterhorn.