Royal Manas National Park is Bhutan's oldest national park, and the Royal government considers it the "conservation showpiece of the Kingdom" and a "genetic depository" for valuable plants. It has an area of 1,057 square kilometres (408 sq mi) and covers eastern Sarpang District, the western half of Zhemgang District, and western Pemagatshel District. It is connected via "biological corridors" to Phibsoo Wildlife Sanctuary, Jigme Singye Wangchuck National Park, Thrumshingla National Park, and Khaling Wildlife Sanctuary. Royal Manas also directly abuts the World Heritage Site Manas National Park in Assam, India, to the south.