Sundarbans is a UNESCO World Heritage site and the largest mangrove forest in the world, famous for the Bengal Tiger and other wildlife. Enjoy a boat ride through the mangrove creeks, observe wildlife such as deer and wild boar and maybe spot the rare Irrawaddy Dolphins. A knowledgeable guide will answer all your questions. Stay overnight in a boat in the forest to immerse yourself in the nature. Note: Some parts of the forest can be closed in May due to monsoon season, please plan accordingly.
Spend the day in the beautiful tea gardens, surrounded by lush green scenery and the aroma of tea leaves. Take a tour of the tea processing factories and learn about the history of tea production in Bangladesh. Sample different kinds of tea at the tea stalls and have lunch at a local village home. Take a dip in the nearby Madhabpur Lake and go for a walk in Lawachara National Park. Stay overnight in a nearby tea resort. Note: Some tea gardens may be closed during the offseason (May-September), please check beforehand.
Cox's Bazar is the longest natural sea beach in the world, stretching over 120 km. Walk along the beach, enjoy the sunrise, and take a dip in the Bay of Bengal. Visit the Himchori Waterfall and Inani Beach for more natural beauty. Have lunch at a local seafood restaurant on the beach and shop for souvenirs at the local markets. Take a sunset boat ride on the Naf River to see the famous Rohingya refugee camps. Stay overnight in a beachside cottage. Note: Check the weather forecast beforehand as there can be monsoons in May which may affect your sightseeing plan.
If you have more time, you can visit the archaeological sites of the ancient city of Mahasthangarh near Bogra, or explore the Lawachara National Park. If you have less time, you can skip Cox's Bazar and return to Dhaka from Srimangal. Monsoon season may affect boat rides and trekking, so it is advisable to check the weather forecast before planning your trip.