Gunung Leuser National Park - Core of Sumatra's Tropical Rainforest Heritage

North Sumatra and Nanggroe Aceh Darussalam (Southeast Aceh, South Aceh, Aceh Singkil) and Regency of Langkat, Indonesia.

The Park consists of steep, almost inaccessible mountainous terrain; part of the 2.5 million hectare Tropical Rainforest Heritage of Sumatra, which is a World Heritage Site; encompasses smaller nature reserves and Alas River runs through the Park into an eastern and western half; last place where orangutans, tigers , elephants, rhinoceros and leopards live together. 

Lowland evergreen dipterocarp forest;  lower and upper montane forest; peat swamp; forest over limestone, sub-alpine meadows and heathlands; freshwater lakes and rivers; and sulphur mineral pools. 

World’s tallest flower: Amorphophallus titanium (when flowering), A. gigas (non-flowering phase); the world’s largest flower: Rafflesia (rafflesia arnoldi);  Daunpayung raksasa (Johannesteijsmannia altifrons);  Rhizanthes zippelnii. 

Sumatran rhinoceros (Dicerorhinus sumatrensis); Sumatran tiger (Panthera tigris); Asian elephant (Elephas maximus); white breasted Thomas leaf monkey (Presbytis thomasi); siamang(Symphalangus syndactylus), Sumatran ground cuckoo (Carpacoccyx  viridis); and white bellied sea eagle (Haliaetusleo cogaster).

Different ethnic groups using natural resources such as wood, dammar, rattan and fish for income; wildlife ecotourism activities like wildlife viewing, jungle trekking, river rafting, caving and horseback riding; mountain climbing and trekking; other activities like kayaking, and canoeing.