Which national park in India is a UNESCO site for its Bengal tigers and mangrove forests?

Sundarbans National Park is the Indian UNESCO site known for Bengal tigers and mangrove forests.

Located in West Bengal on the Ganges–Brahmaputra delta, Sundarbans National Park protects the Indian core of the Sundarbans mangrove ecosystem. Its tidal channels, mudflats and forested islands create habitat for Bengal tigers, saltwater crocodiles, estuarine turtles and many birds. The park is reached primarily by boat because waterways divide much of the landscape.

The area became the core of the Sundarbans Tiger Reserve in 1973 and was declared a national park in 1984. UNESCO inscribed it as a World Heritage Site in 1987 under criteria recognizing important ecological processes and biodiversity. The wider Sundarbans extends across the international border into Bangladesh, where the adjacent protected forest is separately managed.

Kaziranga is famous for Indian one-horned rhinoceroses, while Ranthambore and Jim Corbett are major tiger parks in drier or forested settings. They do not match the defining combination in this question: a UNESCO-listed Indian national park centered on Bengal tigers in a vast tidal mangrove delta.