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
Hinduism in West Bengal Jainism were popular too. Gaur, the first sovereign Hindu kingdom in Bengal with its capital in Karnasubarna in modern-day Murshidabad district, was set up by Shashanka, a Shaivaite king who ruled approximately between 600 AD and 625 AD. The modern structure of Bengali Hindu society was developed during the rule of the Sena dynasty in the 12th century AD. West Bengal has been home to several famous religious teachers, including Sri Chaitanya, Sri Ramakrishna, Rammohan Roy, Swami Vivekananda, A. C. Bhaktivedanta Swami Prabhupada and Paramahansa Yogananda who helped to abolish archaic practices like sati, dowry, and caste-based discrimination or untouchability