Church of Nuestra Señora de las Nieves Monument · Bocos de Duero, Campo de Peñafiel, Valladolid A thirteenth-century Gothic church whose sacristy, of the fourteenth, is covered with a tierceron vault. It presides over a village that in 1845 barely gathered twenty-four houses and one hundred and seventy inhabitants on the bank of the Duero. Photo: Juan Pablo Zumel Arranz (CC BY-SA 4.0) What to see and do in Bocos de Duero