Why Mount Annapurna is the deadliest peak in the world? Annapurna is one of the most amazing mountains to climb in the world. It’s beautiful, it’s majestic, and it offers you all the challenges that you can get your hands on. Despite the fact that Annapurna is the 10th highest peak in the world, it is among the most difficult to climb peaks in the world. Some say that certain sections of Annapurna are even more difficult to climb than K2 and Everest. Not just that, it is also considered one of t