Sundarbans

What travelers say:

Kurna's mangroves are the world's largest virgin forest, a swampy area with rivers of many sizes, and so far have been almost uninhabited, with sika deer and a few Bengal tigers perched in the woods, which are becoming less and less due to poaching. The mangroves in this region span India and Bangladesh, which account for 60 percent of the country. To see the mangroves here, you have to take a cruise, one day to three or four days of boat tours.