The Pamir Mountains are a mountain range in Central Asia and South Asia. They are located at a junction with other notable mountain ranges, namely the Tian Shan, the Karakoram, the Kunlun, the Hindu Kush, and the Himalayas. They are among the world's highest mountains. Much of the range lies in the Gorno-Badakhshan region of Tajikistan. Spanning the border parts of four countries, to the south, they border the Hindu Kush mountains along Afghanistan's Wakhan Corridor in Badakhshan Province and Chitral and Gilgit-Baltistan regions of Pakistan. To the north, they join the Tian Shan mountains along the Alay Valley of Kyrgyzstan. To the east, they extend to the range that includes China's Kongur Tagh, in the "Eastern Pamirs", separated by the Yarkand valley from the Kunlun Mountains. Since the Victorian era, they have been known as the "Roof of the World", presumably a translation from Persian.