Horton Plains in Sri Lanka is the coldest and windiest location in the country. It consists of ecosystems such as Montane evergreen forests, grasslands, marshy lands, and aquatic ecosystems. At an altitude of 2,100 metres above sea level, Horton Plains spreads across over 3,169 hectares of the highest tableland of the island. In view of a large number of endemic flora and fauna species, Horton Plains has declared a UNESCO World Heritage Site on 30th July 2010. Horton Plains, its surroundings, forests and the adjoining Peak Wilderness constitute Sri Lanka’s most important catchment area of almost all major rivers. The plains are also of outstanding scenic beauty and conservation importance, containing most of the habitats and endemic plants and animals representative of the country’s wet and Montane zones. The western slopes support the most extensive area of Montane cloud forest surviving in the island. Horton Plains is not merely a destination for nature tourists. Since the rich biodiversity of Horton Plains is still grossly underexplored, it affords invaluable opportunities to those engaged on educational and research activities. Protecting Horton Plains is a call of duty for all Sri Lankans.