Ama Dablam snow peak, Nepal

22,349 feet high and rising

With its steep, sharp summit, Ama Dablam has been called the 'Matterhorn of the Himalayas.' But in terms of height, the Alpine icon hardly rivals it: Ama Dablam is more than 7,000 feet higher. Here in the world's tallest mountain range, though, it's barely a contender at 22,349 feet—more than 100 of its neighbors rise well past the 23,000 mark. And they're not even fully grown yet: Due to gradual activity in the faults that formed them, the Himalayas rise in elevation almost an inch a year.