The Royal Manas National Park is the oldest national park of Bhutan covers eastern Sarpang District, the western half of Zhemgang District, and western Pemagatshel District. And is It has an area of 1,057 square kilometers and It is home to Bengal tigers, elephants, gaur, rare golden langur, pygmy hog, etc. It is also the only Bhutanese park inhabited by the one-horned rhinoceros and wild water buffalo.