The Indian state of West Bengal borders with Nepal, Bhutan, Bangladesh and the Indian states of Bihar, Jharkhand, Odisha, Assam and Sikkim. The Himalayas lies in the north of the state and the Bay of Bengal is at the south. In between them, the river Ganges flows eastwards and its main distributary, the Hooghly River, flows south to reach the Bay of Bengal. The Siliguri Corridor, which connects North-East India with rest of the India, lies in the North Bengal region of the state. Geographically, West Bengal is divided into a variety of regions—Darjeeling Himalayan hill region, Terai and Doors region, North Bengal plains, Rarh region, Western plateau and high lands, coastal plains, Sunderbans and the Ganges Delta.