Parque Natural Sierra de Cazorla, Segura y Las Villas.

As Spain’s largest protected natural area, this vast expanse in the Jaén province covers over 200,000 hectares of rugged limestone peaks, deep river valleys, and dense pine forests. It serves as a critical sanctuary for the Iberian lynx and Spanish ibex, with biodiversity so significant it has earned UNESCO Biosphere Reserve status. The landscape is defined by the headwaters of the Guadalquivir River and the massive Tranco de Beas reservoir, where water sports and quiet fishing spots are common. Hikers can tackle the Bosques del Sur trail, a 500-kilometer circular route that weaves past prehistoric rock paintings and medieval fortresses perched on rocky outcrops. It is a place of immense scale that manages to feel ancient, blending wild tectonic geology with the silent presence of remote mountain villages like Segura de la Sierra.