mountain stream balason river flowing down to the gangetic plain from himalayan foothills in the terai region of west bengal, in

adventure asia autumn balason beautiful beauty bengal boulders darjeeling destination district dooars duars environment evergreen flowing foothills forest gangetic green greenery hiking hill hills himalaya himalayan india landscape located mountain natural nature outddors outdoor place plain region river rocks scenery scenic season stream summer terai tourism tourist travel traveling trekking water west wild wilderness woods