Church of Santa María de Cubillas Monument · Cubillas de Santa Marta, Campiña del Pisuerga, Valladolid A thirteenth-century fabric of Cistercian lines, sober and of ashlar, which presides over a village of 23.55 square kilometres at 765 metres of altitude, on the bank of the Pisuerga and beside the Canal de Castilla. Photo: Rastrojo (CC BY-SA 4.0) What to see and do in Cubillas de Santa Marta