From a valley a mountain is a silhouette. From above it is a structure: the ridges radiating from the summit, the cirques bitten out by glaciers that may no longer be there, the treeline drawn as a contour, the snow that survives only on north faces.
Peaks, ranges and massifs worldwide, each with aerial views, photographs, video and a guide to their geology, climbing history and the valleys below.
13 Mountains
