Central Highlands of Sri Lanka is the newest recognised world Heritage Site in Sri Lanka. On 31 July 2010, the World Heritage Committee holding its 34th session in Brasília inscribed Central Highlands of Sri Lanka and Papahānaumokuākea of Hawaii as new World Heritage Sites. The site comprises the Peak Wilderness Protected Area, the Horton Plains National Park and the Knuckles Conservation Forest. These are rain forests, where the elevation reaches 2,500 metres (8,200 ft) above sea level. The region harbors a variety of mammal species including the Bear Monkey Trachypithecus vetulus monticola (a ssp. of Purple-faced Langur) and the Horton Plains Slender Loris Loris tardigradus nycticeboides (a ssp.