Horton Plains National Park sits at over 2,100 metres altitude and holds the only significant montane grassland ecosystem in Sri Lanka – a plateau of cloud forest and patana grassland that ends abruptly at World’s End, a sheer 870-metre escarpment with views extending to the southern coast on clear mornings. The endemic wildlife here – purple-faced langurs, sambar deer, Sri Lanka whistling thrush – exists nowhere lower on the island.