Wakhan, or "the Wakhan" (also spelt Vakhan; Persian and , Vâxân and Wāxān respectively; , Vaxon), is a rugged, mountainous part of the Pamir, Hindu Kush and Karakoram regions of Afghanistan. Wakhan District is a district in Badakshan Province. Geography The Wakhan is located in the extreme north-east of Afghanistan. It contains the headwaters of the Amu Darya (Oxus) River, and was an ancient corridor for travellers from the Tarim Basin to Badakshan. The geographic position of Wakhan between China, India, and Bactria allowed it to play a major role in trade in the ancient world. Until 1883, the Wakhan included the whole valley of the Panj River and the Pamir River, as well as the upper flow of the Panj River known as the Wakhan River.<ref>[http://www.juldu.com/Pamir/2%20-%20Significance%20of%20Geopolitical%20Issues%20(Eng).pdf Hermann Kreutzmann (2005): The Significance of Geopolitical Issues for Development of Mountainous Areas of Central Asia] Map at p.12</ref> An 1873 agreement between UK and Russia split the Wakhan by delimiting spheres of influence for the two countries at the Panj and Pamir rivers. Since then, the name Wakhan is now generally used to refer to the Afghan area south of the two rivers. The northern part of the historic Wakhan is now part of the Gorno-Badakhshan Autonomous Province in Tajikistan. The only road into the Wakhan is a rough track from Ishkashim past Qila-e Panja to Sarhad-e Broghil. Paths lead from the end of the road to the Wakhjir Pass, a mountain pass leading to China which is closed to travellers. The western part of the Wakhan, between Ishkashim and Qila-e Panja, is known as Lower Wakhan, which includes the valley of the Panj River. The valleys of the Wakhan River, the Pamir River and their tributaries, and the terrain between, are known as Upper Wakhan. The eastern extremity of Upper Wakhan is known as the Pamir Knot, the area where the Himalayas, Tian Shan, Karakoram, Kunlun, and Hindu Kush ranges meet. West of the Pamir Knot is the Little Pamir, a broad U-shaped grassy valley 100 km long and 10 km wide, which contains Chaqmaqtin Lake, the headwaters of the Aksu or Murghab River. At the eastern end of the Little Pamir is the Tegermansu Valley, from where the closed Tegermansu Pass (4,827 m) leads to China. The Great Pamir or Big Pamir, a 60 km long valley south of Zorkol lake, drained by the Pamir River, lies to the northwest