Central Asia is called the “roof of the world” because of the great mountain ranges there.
The Pamir region of central Asia might also be called the “crossroads of the world”, for here five mountain ranges and five nations meet.
The Pamir Mountains are sometimes known as the Pamir Knot because most of Asia’s great mountain ranges are ”knotted together” by the Pamirs.
Those ranges are the Himalayas, the world’s greatest mountain range, the Hindu Kush, the Karakoram, and the Kunlun and Tien Shan mountains of China. The five nations that meet at the Pamir Knot are Afghanistan, China, Pakistan, India, and the Soviet Union.