English: The River Teesta Flowing across the length of Sikkim, it is fed by snow melting on the mountains as well as rain and meets the river Rangeet at the border between Sikkim and West Bengal. The river is narrow, serpentine and full of rocks and hence are not navigable. Because of swift currents hitting rocks, the river is very noisy and can be heard for miles together. The river finally joins the river Bhramaputra in Bangladesh.