Criterion (x):Iguazu National Park, together with the contiguous World Heritage property of Iguaçu National Park in Brazil and adjacent protected areas, forms the largest single protected remnant of the Paranaense subtropical rainforest, which belongs to the Interior Atlantic Forest. IntegrityIguazú National Park has a long conservation history dating back to the early 20th Century and was declared a national park in 1934 illustrating the longstanding recognition of its quality. The integrity of Iguazú National Park must be considered in conjunction with the sister property in neighbouring Brazil. The prominent role as a major international and domestic tourism destination makes Iguazú National Park a highly visible property. Protection and management requirementsIguazu National Park is owned by the national government and is an integral part of Argentina’s National System of Federal Protected Areas SIFAP (under the National Parks Law Nº 22351) and was created as early as 1934 (Law Nº 12103).