Festivities of invierno de Sestrica Activity · Sestrica, Aranda, Zaragoza Image of Sestrica, not of the place itself. Sestrica's winter festival is held at the foot of the sierra de Vicort, which separates the valley of the Aranda from that of Calatayud, in a village where shepherd's migas with longaniza, grapes or chocolate remain a dish for group meals. Photo: Touriste (Public domain) What to see and do in Sestrica