Manú National Park (Spanish: Parque Nacional del Manu) is a biosphere reserve located in Madre de Dios and Paucartambo, Cusco. Before becoming an area protected by the Peruvian government, the Manú National Park was conserved thanks to its inaccessibility. The park remains fairly inaccessible by road to this day. In 1977, UNESCO recognised it as a Biosphere Reserve and in 1987, it was pronounced a World Heritage Site. It is the largest National Park in Peru, covering an area of 15,328 km². The Biosphere Reserve includes an additional 2,570 km², and a further 914 km² are included in a "Cultural Zone" (which also is afforded a level of protection), bringing the total area up to 18,811 km².