Sundarbans has been declared World Heritage Site by UNESCO, the largest Mangrove Forest between the two countries. It is the kingdom of the Royal Bengal tiger and you will find various kinds of species of birds, animals & plants I think you should visit the tranquilizing beauty of Sundarbans once in your life. Hills are always enchanting to the tourist and as a tourist, you should visit Chittagong Hill Tracks once which is the home of many tribes and you can discover yourself in the amazing green view. Chittagong Hill Tracks is the best place for making an adventurous tour and for this you have to take permission from the authority. The Capital of tea in Bangladesh is Srimagal which is situated in the northeastern part of the country where you will find lush greenery fields all around. It is one of the best places in Bangladesh where you can have the place & calm environment and there are two more visiting places too, Lawachhara National Park & Hamham Waterfalls.