Bandarban District (Chittagong division) with an area of 4,479 sq km, is bounded by rangamati district on the north, Arakan (Myanmar) and the river naf on the south, Arakan and Rangamati district on the east and chittagong and cox's bazar district on the west. Bandarban mostly consists of forests and hills. Main rivers are Shankha (Sangu), Matamuhuri and bakkhali. The four major mountain ranges of the district are the Meranja, Wailatong, Tambang and Politai. Bagakain or Baga Lake is notable. Annual average temperature maximum 34.6 oC and minimum 13 oC. Annual rainfall 3031 mm.