La Guardia de Jaén or Guardia de Jaén, La, and the old Mentesa Bastia at Iberic and Roman era, is a small city located in the province of Jaén at western end of Sierra Mágina, on the Cerro de San Marcos, near the promontory of Cerro de San Cristóbal, from where it dominates the valley of the river Guadalbullón. Wikipedia