Sundarbans National Park is located in World's largest Ganges Delta formed by the confluence of the rivers Ganga, Brahmaputra and Meghana. A national park, a Tiger reserve and a biosphere reserve is home to the largest population of Royal Bengal Tigers in the world. Historically known for notorious man eating Tigers, the number of the conflict have been reduced almost by 75% over last few years due to some intense work by the forest department. Sundarbans is the world's largest estuarine sanctuary. Home to the Royal Bengal tigers along with a sizeable population of spotted deer, wild pigs, monkeys, kingfishers, herons and eagles. The Sundarbans is also known for the Ridley Sea Turtles. Only way to do safaris in Sundarbans is by boats in the flowing rivers, these boats are controlled by the Government. Tiger sightings are rare here, but again a great place for birding. One can also visit the site of Crocodile breeding farm and Sajnekhali Bird Sanctuary.