Course: The Teesta flows southward through the Sikkim Himalayas, passing towns like Rangpo, and then through West Bengal before entering Bangladesh, where it joins the Brahmaputra River (known as the Jamuna River in Bangladesh). Historically, the Teesta was a major tributary of the Ganges River. The Teesta River is a transboundary river that flows through the Indian states of Sikkim and West Bengal, as well as Bangladesh . It originates in the Himalayas in Sikkim and flows for approximately 414 km before emptying into the Bay of Bengal. Among the other rivers of northern India, Teesta River is also called as younger daughter of Himalaya. The Teesta River originates from the Pahunri (or Teesta Kangse) glacier above 7,068 m, and flows southward through gorges and rapids in the Sikkim Himalaya. Discover the Teesta River - its origin, passage through Sikkim and West Bengal, tributaries, and its vital role in agriculture and hydropower.