The southern circuit is the ecological hub of the country comprising of seven southern districts of Bhutan, namely, Samtse, Chukha, Dagana, Tsirang, Sarpang, Zhemgang and Pemagatshel. Zhemgang, one of the districts in southern Bhutan is ideal for nature oriented tours though the cultural highlights are irresistible. The famous Dunmang hot spring is in Zhemgang district. There are also other hot springs in Sarpang district.
Other tour activities and attractions includes the Phibsoo Wildlife Sanctuary, the Royal Manas National Park, the tropical fruits and numerous species of medicinal plants and the culture of the Khengpas and the Lhotsampas.
The Lhotsampas are the ethnic race of Nepalese origin, settled in the southern part of Bhutan. Mostly Hindus, their rituals and festivals are very colorful.