Sustainability
Countries with the Most Mountainous Terrain (2025 Ranked)
Bhutan is the world's most mountainous country — 98% of its territory is above 600m. Nepal has the world's highest peaks including Everest. The Himalayas, Andes, and Alps define some of Earth's most dramatic geography. Here's the full ranking of the world's most mountainous nations and what extreme altitude means for human life.