The Hindu Kush and Himalayan Mountains were the physical features that limited the Indian subcontinent’s contact with other peoples.
The Hindu Kush is an 800 kilometre long (500 mi) mountain range in Central and South Asia to the west of the Himalayas. It extends from central and western Afghanistan into northwestern Pakistan and far southeastern Tajikistan.
The Himalayas is the most heightened mountain range in the world. These are a mountain range in Asia, dividing the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's most elevated peaks, including the very highest, Mount Everest. Over 100 peaks surpassing 7,200 m in peak lie in the Himalayas.
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