The birth of Juan Martín el Empecinado Historical milestone · Castrillo de Duero, Campo de Peñafiel, Valladolid Image of Castrillo de Duero, not of the place itself. In this village of the riverbank was born the guerrilla fighter who harassed the Napoleonic troops throughout Castile. He died in 1825, after being tried and executed during the absolutist reaction that followed the Trienio Liberal. 1775 Photo: Ydelpico (CC BY-SA 3.0) What to see and do in Castrillo de Duero