Criterion (iii): The pastures and meadows of the Pyrénées – Mont Perdu, with their villages and trails that link them, are a remarkable witness of a very rare transhumance system in Europe, still practised by seven communities that mainly live adjacent to the property.Criterion (iv): The high valleys and the calcareous summits of the Pyrénées – Mont Perdu are an outstanding example of a landscape shaped by a pastoral transhumance system that was developed in the Middle Ages and still exists today.Criterion (v): The model of the habitat of the Pyrénées – Mont Perdu with its villages, fields and meadows, as the basis of a seasonal migration of men and animals to the high pastures during the summer season, is an outstanding example of a type of transhumance that was once widespread in the mountainous regions of Europe, but which today is rare.Criterion (vii): The property is an exceptional landscape with meadows, lakes, caves, mountains and forests. In addition, the region is of great interest for science and conservation, possessing a panoply of geological, panoramic, faunistic and floristic elements that make it one of the most important Alpine protected areas in Europe.Criterion (viii): The calcareous massif of Mont Perdu presents a series of classic geological landforms such as the deeply-incised canyons and spectacular cirques. The region is distinguished by its location at the tectonic collision point between the Iberian and west European plates. The property presents an exceptional geological unity, forming a calcareous massif withMont Perdu at its centre. The resulting landscape is considerably different on the northern slopes (France) and the southern slopes (Spain).