West Bengal is located in the eastern part of India. It is bounded on its north by Bhutan and the state of Sikkim, on its east by Bangladesh, on its northeast by the state of Assam, on its south by the Bay of Bengal, on its southwest by the state of Odisha, on its northwest by Nepal, and on its west by the state of Bihar. The alluvial plain in the south is watered by the legendary River Hooghly and its tributaries - Mayurakshi, Damodar, Kangsabati and the Rupnarayan. The Himalayan north, comprising the districts of Darjeeling, Jalpaiguri and Cooch Behar are watered by the swift flowing rivers Teesta, Torsa, Jaldhaka and Ranjit. Variations in altitude result in diversity in the nature and climate of West Bengal. From the northern highlands at the feet of the Himalayas to the tropical forests of Sunderbans, West Bengal is a land of myriad beauty, each region different from the other.