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
Institute of Science and Technology, West Bengal Institute of Science and Technology, West Bengal Institute of Science & Technology (informally IST CK Town, IST CKT or simply IST) is a Private engineering and management oriented institute of higher education located in West Bengal, India. It is an institution recognized by Directorate of Technical Education, West Bengal. It is affiliated with West Bengal University of Technology (Wbut) and West Bengal State Council Of Technical Education (WBSCTE). The institute is also recognised by Government of West Bengal and all its courses are duly approved by All India Council of Technical Education (AICTE). IST is considered as an emerging hub