Sierras de Cazorla, Segura y Las Villas Natural Park is a natural park in the eastern and northeastern part of the province of Jaén, Spain, established in 1986. With an area of 2,099.2 square kilometres, it is the largest protected area in Spain and the second largest in Europe. It was declared a biosphere reserve by UNESCO in 1983 and also a Special Protection Area for migratory birds in 1988.