Country boat ride in the Sundarbans estuaries and mangroves is a different experience altogether. br br The largest mangrove forest in the world is a mist-shrouded, river-riddled swamp region of shifting tides, man-eating tigers and off-the-beaten-track adventure. It's surrounded on three sides by two of the most densely populated countries on earth – India and Bangladesh – yet it remains remote, inhospitable and largely uninhabited by people. br br This is truly wild terrain, and chug-chugging along its river channels into its swampy heart of darkness is as thrilling as it is serene.