Festivities of invierno de Gelsa (San Antón) Activity · Gelsa, Ribera Baja del Ebro, Zaragoza Image of Gelsa, not of the place itself. Festival of San Antón Abad, patron saint of animals, with a communal bonfire on the eve of 17 January and the blessing of livestock and pets, a custom shared by the villages of the Ribera Baja del Ebro, amid market gardens of onion, tomato and pepper such as Gelsa's own. Photo: Ecelan (CC BY-SA 4.0) What to see and do in Gelsa