Festivities of Agón Activity · Agón, Campo de Borja, Zaragoza Image of Agón, not of the place itself. Agón celebrates its patronal festivities in honor of San Pedro Mártir on 29 April and Nuestra Señora de los Ángeles on 2 August. The town was walled in antiquity, and from that enclosure the so-called Puerta del de Bisimbre survives. Photo: Iggy1975 (CC BY-SA 4.0) What to see and do in Agón