The Pamir Mountains are a mountain range in Central Asia formed by the junction or knot of the Himalayas, Tian Shan, Karakoram, Kunlun, and Hindu Kush ranges. They are among the world’s highest mountains and since Victorian times they have been known as the "Roof of the World" a probable translation from the Persian.
The precise extent of the Pamir Mountains is debatable. They lie mostly in Gorno-Badakhshan province, Tajikistan and Badakshan Province, Afghanistan. To the north they join the Tian Shan mountains along the Alay Valley of Kyrgyzstan. To the south they join the Hindu Kush mountains along the Wakhan Corridor in Afghanistan/Pakistan, and also Gilgit-Baltistan in Pakistan. To the east they may end on the Chinese border or extend to the range that includes Kongur Tagh which is sometimes included in the Kunlun Mountains.