Conca de Tremp Montsec Geopark in north-eastern Spain, close to the borders of France and Andorra, is characterized by a set of East-West oriented mountain ranges and basins. This alignment corresponds to the various overthrust napes making up the southern slope of the Central Pyrenees. The geological record covers the past 550 million years. The rich natural heritage of the southern slopes of the Pyrenees is internationally recognized as a natural laboratory for sedimentology, tectonics, external geodynamics, palaeontology, ore deposits and soil science. The area includes a very broad representation of the evolution of life on Earth and includes sites from the Permian to the Paleogene: fossils of vertebrates, invertebrates and plants.