Bay of Bengal is the northern part of the Indian Ocean, bordering on India, Bangladesh, and Myanmar. The rivers that empty into the bay include the Ganges, Brahmaputra, and Irrawaddy. Important seaports on the bay are Kolkata, Chennai, and Yangon. The west coast of the Bay of Bengal is regular, and has few harbors. The east coast is irregular. The Andaman and Nicobar Islands and the Mergui Archipelago lie in the eastern part of the bay.