Hermitage of Peralta de Calasanz Monument · Peralta de Calasanz, La Litera, Huesca Hermitage in the municipal district of Peralta de Calasanz, a municipality whose salt pans of the ravine, with terraced ponds and declared a bien de interés cultural, supplied the region's pig slaughters for centuries. Photo: Guadalupe Cervilla (CC BY-SA 2.0) What to see and do in Peralta de Calasanz