Tourism in West Bengal is in the South Asia region of Bengal, consisting of West Bengal and its neighbouring country of Bangladesh. It is the world's largest delta, and empties into the Bay of Bengal. It is one of the most fertile regions in the world, thus earning the nickname "The Green Delta". It stretches from the Hooghly River on the west to the Meghna River on the east. It is approximately across at the Bay of Bengal. Kolkata and Haldia are the principal Indian seaports on the delta. The Acharya Jagadish Chandra Bose Indian Botanic Garden or Calcutta Botanical Garden (previously known as
Cities and towns in West Bengal Cities and towns in West Bengal West Bengal is the state with highest population density in India. The state is dotted with several small and medium towns and cities. Historically, the main source of income of the people of West Bengal has been farming, and, as a consequence, the state previously had a large rural population skew. At the turn of the 20th century, however, the role of industry in West Bengal increased substantially, leading to a population move into urban areas. In 1947, when India gained independence, the erstwhile British Indian province of Bengal was divided into two parts: