Festivities of invierno de Urrea de Gaén Activity · Urrea de Gaén, Bajo Martín, Teruel Image of Urrea de Gaén, not of the place itself. In Urrea de Gaén, the bonfire of San Antón is lit on 17 January and, twelve days later, that of San Valero, as part of the winter cycle of the santos capudos of the Bajo Martín. Photo: Juan Emilio Prades Bel (CC BY 4.0) What to see and do in Urrea de Gaén