A towering wall of peaks, ridges, and deep river gorges forming the northern boundary of India, Nepal, and Bhutan. The south-facing slopes capture monsoon moisture, creating fertile foothills and terraced agriculture, while the high ranges isolate valleys into distinct cultural worlds. This geography acts simultaneously as a shield and a filter: blocking northern invasions while channeling limited but culturally significant trans-Himalayan exchange. Civilizations here are mountain-fortified, autonomous, and deeply tied to elevation-based ecology.
