Bordering the southern edge of the district, Royal Manas National Park is Bhutan’s oldest protected nature reserve and the crown jewel of its sub-Himalayan biodiversity. Encompassing pristine tropical and subtropical broadleaf rainforests, the park forms a vital transboundary ecological haven that protects critically endangered wildlife—including the Royal Bengal tiger, Asian elephant, greater one-horned rhinoceros, clouded leopard, and the endemic golden langur found only along this river basin.
A guided safari or river excursion into the Sarpang access corridors of the park delivers a raw, unfiltered wilderness experience far removed from mountain trekking circuits. Guided by local park naturalists, travelers can take quiet boat drifts along the river, walk elevated watchtower trails, and spot rare birds like the great Indian hornbill and rufous-necked hornbill among giant dipterocarp trees. It is a striking reminder of Bhutan’s strict constitutional commitment to environmental stewardship and pristine nature preservation.