Glacier National Park in Montana is arguably America’s most stunning landscape, with carved massive glaciers and a melting ice cycle that supports ecosystems of more than 2,000 species of plants and animals. However, the glaciers are disappearing at a rapid rate and may be gone in just 10 years. Following the collapsing of the park's most prominent mountain of ice, National Geographic treks into the Continental Divide to uncover the hidden secrets of this transforming landscape.