Castillo de Petilla Historical milestone · Petilla de Aragón, Sangüesa, Navarra Image of Petilla de Aragón, not of the place itself. A rock fortress on the crag "La Torreta," with a three-story tower and a garrison usually of 30 men, of which only grooves in the rock remain today. It was demolished in 1512 by order of Fernando the Catholic. 1512 Photo: Jialxv (CC BY-SA 4.0) What to see and do in Petilla de Aragón