Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Qala Wust (name variants: Kala Wust, st, Qal ah-ye st (BGN standard), Qal a-i- st, Qala Ust, Qala Yost, Qal eh-ye Vost) is a mountain village in the Wakhan region of the Badakhshan Province, north-eastern Afghanistan. Qala Wust is a settlement of Tajik highlanders. The village gave names to the Qala Wust Valley, Qala Wust Gneiss formation, and made a former name (Koh-i Qala-i Ust; koh-i means "mountain of") of the Kohanha massif. Wakhan or "the Wakhan" (also spelt Vakhan; Persian and Pashto: , Tajik: ) is a very mountainous and rugged part of the Pamir and Karakoram regions of Afghanistan. Parts of it are located in Wakhan District in Badakshan Province of Afghanistan. The Wakhan is located in and around 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. Historically the Wakhan included the whole valley of the Pamir River and the upper flow of the Panj River known as the Wakhan River.