The Sylhet valley is formed by a beautiful, winding pair of rivers named the Surma and the Kushiara both of which are fed by innumerable hill streams from the north and the south. The valley has good number of haors, which are big natural depressions. During winter these haors are vast stretches of green land, but in the rainy season they turn into turbulent seas.
Sylhet division occupies the north east part of Bangladesh , has an area of 12596 sq. km and a population of 7.899 million. There are 4 districts and 14 municipalities under Barisal . It is a natural hilly, forest area with ox bow lakes and famous shrines.