West Bengal Blocks consists of panchayats (village councils) and town municipalities. The capital and largest city of the state is Kolkatathe third-largest urban agglomeration and the seventh-largest city in India. Asansol is the second-largest city and urban agglomeration in West Bengal after Kolkata. Siliguri is an economically important city, strategically located in the northeastern Siliguri Corridor (Chicken's Neck) of India. Other cities and towns in West Bengal with 2011 populations over 250,000 are Durgapur, Bardhaman, English Bazar, Baharampur, Habra, Kharagpur, and Shantipur. , West Bengal has the sixth-highest GSDP in India. GSDP at current prices (base 2004–2005) has increased from Rs 2,08,656
Geography of West Bengal delta is the largest mangrove forest in the world. It lies at the mouth of the Ganges and is spread across areas of Bangladesh and West Bengal, India. The Bangladeshi and Indian portions of the jungle are listed in the UNESCO world heritage list separately as the Sundarbans and Sundarbans National Park respectively, though they are parts of the same forest. The Sundarbans are intersected by a complex network of tidal waterways, mudflats and small islands of salt-tolerant mangrove forests, and presents an excellent example of ongoing ecological processes. The area is known for its wide range of fauna. The