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. It is an old city with full of natural beauties. Sylhet thus became a district of saints, shrines and daring but virile people. Its rich potentialities became easily attractive and the 18th century Englishmen made their fortune in tea plantation. A visit to the tea plantation in Sylhet is a memorable experience. Sylhet, the tea granary of Bangladesh, not only has over 150 tea gardens but also proudly possesses three largest tea gardens in the world in both area and production. A large number of tourists come every year to visit Sylhet.