The Duero as the northern boundary Nature · Quintanilla de Arriba, Campo de Peñafiel, Valladolid Image of Quintanilla de Arriba, not of the place itself. The 28.18 square kilometres of the municipal district climb from 730 to 892 metres from the bank of the Duero, which serves as its northern boundary, up to the moorland. On the Pico del Castro prehistoric ceramics have appeared. Photo: Rastrojo (D•ES) (CC BY-SA 4.0) What to see and do in Quintanilla de Arriba