The Hindu Kush is a mountain range, a spur running southwest off the Pamir Knot, which is a large clump of high ground at the western end of the Himalayas. It is difficult country for travel; a disputed but plausible claim is that the name means "Hindu killer".
Most of the range is in northern Afghanistan, some in Pakistan. Band-e Amir National Park is in the region. The Afghan province of Nuristan is located within the Hindu Kush, and the Wakhan Corridor leads from this range up into the Pamirs and the Xinjiang autonomous region of China.